["th\u00f4 r\u00e1p t\u1eeb d\u01b0\u1edbi g\u1ed1c r\u1ed3i lan d\u1ea7n l\u00ean t\u00e1n khi c\u00e2y gi\u00e0 \u0111i. \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao b\u1ea1n th\u1ea5y r\u00eau m\u1ecdc \u1edf ch\u1ed7 ch\u1ec9 cao h\u01a1n m\u1eb7t \u0111\u1ea5t m\u1ed9t ho\u1eb7c hai inch (2,54 \u2013 5,08 cm) tr\u00ean nh\u1eefng c\u00e2y non, trong khi sau \u0111\u00f3 ch\u00fang s\u1ebd b\u1ecdc l\u1ea5y ph\u1ea7n th\u00e2n d\u01b0\u1edbi c\u1ee7a c\u00e2y gi\u1ed1ng nh\u01b0 m\u1ed9t chi\u1ebfc t\u1ea5t cao \u0111\u1ebfn g\u1ed1i v\u1eady. R\u00eau kh\u00f4ng g\u00e2y h\u1ea1i cho c\u00e2y, v\u00e0 lo\u00e0i th\u1ef1c v\u1eadt t\u00ed hon n\u00e0y s\u1ebd b\u00f9 \u0111\u1eafp l\u1ea1i l\u01b0\u1ee3ng n\u01b0\u1edbc b\u00e9 nh\u1ecf m\u00e0 ch\u00fang l\u1ea5y \u0111i b\u1eb1ng c\u00e1ch nh\u1ea3 ra h\u01a1i \u1ea9m. V\u00ec v\u1eady ch\u00fang c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u00edch c\u1ef1c \u0111\u1ed1i v\u1edbi kh\u00ed h\u1eadu trong r\u1eebng. V\u1eady ch\u00fang ta ch\u1ec9 c\u00f2n c\u00e2u h\u1ecfi l\u00e0 r\u00eau l\u1ea5y th\u1ee9c \u0103n t\u1eeb \u0111\u00e2u. N\u1ebfu th\u1ee9c \u0103n kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb \u0111\u1ea5t, th\u00ec n\u01a1i duy nh\u1ea5t r\u00eau c\u00f3 th\u1ec3 l\u1ea5y th\u1ee9c \u0103n ch\u00ednh l\u00e0 t\u1eeb kh\u00f4ng kh\u00ed. M\u1ed9t l\u01b0\u1ee3ng b\u1ee5i \u0111\u1ea5t l\u1edbn \u0111\u01b0\u1ee3c th\u1ed5i kh\u1eafp r\u1eebng h\u00e0ng n\u0103m. M\u1ed9t c\u00e2y tr\u01b0\u1edfng th\u00e0nh c\u00f3 th\u1ec3 l\u1ecdc h\u01a1n 200 pound b\u1ee5i \u0111\u1ea5t (90,72 kg), v\u00e0 s\u1ed1 b\u1ee5i n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c m\u01b0a d\u1ed9i xu\u1ed1ng th\u00e2n c\u00e2y. R\u00eau h\u1ea5p thu h\u1ed7n h\u1ee3p b\u1ee5i \u0111\u1ea5t \u1ea5y v\u00e0 l\u1ecdc ra nh\u1eefng th\u1ee9 ch\u00fang c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng. V\u1eady l\u00e0 gi\u1ea3i quy\u1ebft xong chuy\u1ec7n th\u1ee9c \u0103n, v\u00e0 gi\u1edd v\u1ea5n \u0111\u1ec1 duy nh\u1ea5t c\u00f2n thi\u1ebfu ch\u00ednh l\u00e0 \u00e1nh s\u00e1ng. Trong nh\u1eefng khu r\u1eebng th\u00f4ng hay s\u1ed3i s\u00e1ng s\u1ee7a, \u00e1nh s\u00e1ng kh\u00f4ng th\u00e0nh v\u1ea5n \u0111\u1ec1, nh\u01b0ng n\u00f3 l\u1ea1i l\u00e0 v\u1ea5n \u0111\u1ec1 l\u1edbn trong nh\u1eefng khu r\u1eebng v\u00e2n sam v\u0129nh vi\u1ec5n t\u0103m t\u1ed1i. Th\u1eadm ch\u00ed nh\u1eefng k\u1ebb s\u1ed1ng \u0111\u1ea1m b\u1ea1c nh\u1ea5t c\u0169ng ph\u1ea3i tr\u00e1nh kh\u1ecfi n\u01a1i \u1ea5y, v\u00e0 \u0111\u00f3 l\u00e0 l\u00fd do v\u00ec sao nh\u1eefng qu\u1ea7n th\u1ec3 \u0111\u1eb7c bi\u1ec7t d\u00e0y \u0111\u1eb7c c\u1ee7a nh\u1eefng c\u00e2y non trong c\u00e1c r\u1eebng c\u00e2y ng\u00e0nh th\u00f4ng h\u1ea7u nh\u01b0 ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 r\u00eau m\u1ecdc. Ch\u1ec9 khi c\u00e2y gi\u00e0 \u0111i, khi m\u00e0 nh\u1eefng kho\u1ea3ng tr\u1ed1ng \u0111\u00f3 \u0111\u00e2y xu\u1ea5t hi\u1ec7n tr\u00ean t\u00e1n r\u1eebng, th\u00ec m\u1edbi c\u00f3 \u0111\u1ee7 \u00e1nh m\u1eb7t tr\u1eddi l\u1ecdt xu\u1ed1ng \u0111\u1ec3 c\u00e2y \u0111\u01b0\u1ee3c bao ph\u1ee7 trong l\u1edbp kho\u00e1c r\u00eau xanh. M\u1ecdi th\u1ee9 kh\u00e1 kh\u00e1c trong nh\u1eefng r\u1eebng d\u1ebb gai c\u1ed5 th\u1ee5, v\u00ec \u1edf \u0111\u00e2y r\u00eau \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb nh\u1eefng kho\u1ea3ng th\u1eddi gian ngh\u1ec9 khi c\u00e2y r\u1ee5ng tr\u1ee3 l\u00e1 v\u00e0o m\u00f9a xu\u00e2n v\u00e0 m\u00f9a thu. V\u00e0o m\u00f9a h\u00e8, r\u1eebng l\u1ea1i l\u1ea7n n\u1eefa tr\u1edf n\u00ean qu\u00e1 t\u1ed1i t\u0103m, nh\u01b0ng th\u1ef1c v\u1eadt \u0111\u00e3 th\u00edch nghi v\u1edbi chu k\u1ef3 \u0111\u00f3i kh\u00e1t n\u00e0y r\u1ed3i. Th\u1ec9nh tho\u1ea3ng, kh\u00f4ng c\u00f3 m\u01b0a su\u1ed1t h\u00e0ng th\u00e1ng tr\u1eddi. N\u1ebfu b\u1ea1n vu\u1ed1t tay tr\u00ean m\u1ed9t \u0111\u1ec7m r\u00eau khi \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft kh\u00f4 h\u1ea1n, b\u1ea1n s\u1ebd th\u1ea5y r\u00eau h\u00e9o qu\u1eaft ho\u00e0n to\u00e0n. Ph\u1ea7n l\u1edbn th\u1ef1c v\u1eadt s\u1ebd ch\u1ebft trong giai \u0111o\u1ea1n th\u1ebf n\u00e0y, nh\u01b0ng r\u00eau th\u00ec kh\u00f4ng. N\u00f3 s\u1ebd ph\u1ed3ng l\u00ean khi c\u01a1n m\u01b0a r\u00e0o n\u1eb7ng h\u1ea1t k\u1ebf ti\u1ebfp \u1eadp \u0111\u1ebfn \u2013 v\u00e0 s\u1ef1 s\u1ed1ng l\u1ea1i ti\u1ebfp t\u1ee5c.","\u0110\u1ecba y th\u1eadm ch\u00ed c\u00f2n ti\u1ebft ki\u1ec7m h\u01a1n. D\u1ea1ng s\u1ed1ng nh\u1ecf b\u00e9 c\u00f3 m\u00e0u x\u00e1m xanh n\u00e0y l\u00e0 th\u1ec3 k\u1ebft h\u1ee3p c\u1ed9ng sinh gi\u1eefa n\u1ea5m v\u00e0 t\u1ea3o. \u0110\u1ec3 b\u00e1m v\u00e0o nhau, ch\u00fang c\u1ea7n m\u1ed9t lo\u1ea1i ch\u1ea5t n\u1ec1n n\u00e0o \u0111\u00f3, v\u00e0 trong r\u1eebng, lo\u1ea1i ch\u1ea5t n\u1ec1n n\u00e0y \u0111\u01b0\u1ee3c c\u00e2y cung c\u1ea5p. Tr\u00e1i ng\u01b0\u1ee3c v\u1edbi r\u00eau, ch\u00fang tr\u00e8o l\u00ean ch\u1ed7 kh\u00e1 cao tr\u00ean th\u00e2n, n\u01a1i m\u00e0 s\u1ef1 sinh tr\u01b0\u1edfng v\u1ed1n \u0111\u00e3 c\u1ef1c k\u1ef3 ch\u1eadm c\u1ee7a ch\u00fang s\u1ebd b\u1ecb t\u00e1n r\u1eebng \u0111\u1ea7y l\u00e1 l\u00e0m tr\u00ec tr\u1ec7 nhi\u1ec1u h\u01a1n n\u1eefa. Th\u01b0\u1eddng ch\u00fang s\u1ebd m\u1ea5t nhi\u1ec1u n\u0103m \u0111\u1ec3 ph\u00e1t tri\u1ec3n th\u00e0nh m\u1ed9t l\u1edbp ph\u1ee7 ngo\u00e0i tr\u00f4ng gi\u1ed1ng m\u1ed1c meo quanh v\u1ecf c\u00e2y, khi\u1ebfn nhi\u1ec1u du kh\u00e1ch vi\u1ebfng th\u0103m khu r\u1eebng c\u1ee7a t\u00f4i hay h\u1ecfi r\u1eb1ng c\u00f3 ph\u1ea3i c\u00e2y b\u1ecb b\u1ec7nh kh\u00f4ng. C\u00e2y kh\u00f4ng b\u1ecb b\u1ec7nh; \u0111\u1ecba y kh\u00f4ng h\u1ec1 l\u00e0m h\u1ea1i ch\u00fang, v\u00e0 c\u00e2y hi\u1ec3n nhi\u00ean ho\u00e0n to\u00e0n ch\u1eb3ng quan t\u00e2m \u0111\u1ebfn s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a \u0111\u1ecba y. D\u1ea1ng s\u1ed1ng t\u00ed hon n\u00e0y \u0111i\u1ec1u h\u00f2a nh\u1ecbp sinh tr\u01b0\u1edfng ch\u1eadm nh\u01b0 s\u00ean c\u1ee7a ch\u00fang b\u1eb1ng vi\u1ec7c s\u1ed1ng c\u1ef1c k\u1ef3 th\u1ecd. Ch\u00fang c\u00f3 th\u1ec3 s\u1ed1ng s\u00f3t h\u00e0ng tr\u0103m n\u0103m, \u0111i\u1ec1u \u1ea5y cho th\u1ea5y r\u1eb1ng nh\u1eefng d\u1ea1ng sinh v\u1eadt n\u00e0y t\u01b0\u01a1ng th\u00edch ho\u00e0n h\u1ea3o v\u1edbi nh\u1ecbp s\u1ed1ng ch\u1eadm ch\u1ea1p trong nh\u1eefng khu r\u1eebng c\u1ed5 \u0111\u1ea1i.","\u20142\u26057\u2014 NH\u1eeeNG \u0110\u1ee8A TR\u1eba \u0110\u01af\u1edcNG PH\u1ed0 B\u1ea1n c\u00f3 t\u1eebng bao gi\u1edd t\u1ef1 h\u1ecfi v\u00ec sao nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf kh\u1ed5ng l\u1ed3 \u1edf ch\u00e2u \u00c2u ch\u1eb3ng bao gi\u1edd m\u1ecdc cao th\u1eadt cao kh\u00f4ng? M\u1eb7c d\u00f9 r\u1ea5t nhi\u1ec1u trong s\u1ed1 ch\u00fang c\u00f3 tu\u1ed5i th\u1ecd \u0111\u1ebfn 150 n\u0103m, r\u1ea5t \u00edt c\u00e2y cao h\u01a1n 160 feet (48,768 m). T\u1ea1i qu\u00ea h\u01b0\u01a1ng ch\u00fang \u2013 nh\u1eefng khu r\u1eebng tr\u00ean c\u00e1c tri\u1ec1n d\u1ed1c h\u01b0\u1edbng v\u1ec1 ph\u00eda t\u00e2y c\u1ee7a d\u00e3y n\u00fai Sierra Nevada \u1edf California \u2013 ch\u00fang d\u1ec5 d\u00e0ng l\u1edbn h\u01a1n g\u1ea5p \u0111\u00f4i k\u00edch th\u01b0\u1edbc \u0111\u00f3. V\u1eady t\u1ea1i sao ch\u00fang l\u1ea1i kh\u00f4ng l\u1edbn \u0111\u01b0\u1ee3c nh\u01b0 v\u1eady khi s\u1ed1ng \u1edf ch\u00e2u \u00c2u? N\u1ebfu ta nh\u1edb l\u1ea1i qu\u00e3ng th\u1eddi gian b\u00e9 th\u01a1 c\u1ee7a c\u00e2y, nh\u1edb l\u1ea1i th\u1eddi ni\u00ean thi\u1ebfu c\u1ef1c k\u1ef3 d\u00e0i l\u00e2u c\u1ee7a ch\u00fang, ta c\u00f3 th\u1ec3 ma xui qu\u1ef7 khi\u1ebfn m\u00e0 th\u1ed1t l\u00ean r\u1eb1ng: Ch\u00fang v\u1eabn c\u00f2n l\u00e0 tr\u1ebb con. B\u1ea1n mong m\u1ecfi g\u00ec \u1edf ch\u00fang ch\u1ee9? Nh\u01b0ng \u0111i\u1ec1u \u0111\u00f3 kh\u00f4ng h\u1ec1 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u01b0\u1eddng k\u00ednh kh\u1ed5ng l\u1ed3 c\u1ee7a nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf c\u1ed5 th\u1ee5 kh\u1ed5ng l\u1ed3 \u1edf ch\u00e2u \u00c2u \u2013 th\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 8 feet (2,438 m) (\u0111\u01b0\u1ee3c \u0111o \u1edf n\u01a1i cao ngang ng\u1ef1c ng\u01b0\u1eddi). R\u00f5 r\u00e0ng, ch\u00fang bi\u1ebft c\u00e1ch l\u1edbn l\u00ean. Ch\u1ec9 l\u00e0 ch\u00fang d\u01b0\u1eddng nh\u01b0 d\u1ed3n n\u0103ng l\u01b0\u1ee3ng ph\u00e1t tri\u1ec3n theo h\u01b0\u1edbng sai l\u1ea7m m\u00e0 th\u00f4i. \u0110\u1ecba \u0111i\u1ec3m c\u1ee7a ch\u00fang cho th\u1ea5y manh m\u1ed1i v\u00ec sao ch\u00fang l\u1ea1i ph\u00e1t tri\u1ec3n ki\u1ec3u nh\u01b0 v\u1eady. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng trong nh\u1eefng c\u00f4ng vi\u00ean th\u00e0nh ph\u1ed1 b\u1edfi c\u00e1c ho\u00e0ng t\u1eed v\u00e0 c\u00e1c ch\u00ednh tr\u1ecb gia nh\u01b0 m\u1ed9t lo\u1ea1i k\u1ef3 hoa d\u1ecb th\u1ea3o. Th\u1ee9 quan tr\u1ecdng thi\u1ebfu m\u1ea5t \u1edf \u0111\u1ea5y ch\u00ednh l\u00e0 r\u1eebng hay \u2013 c\u1ee5 th\u1ec3 h\u01a1n \u2013 ch\u00ednh l\u00e0 c\u00e1c h\u1ecd h\u00e0ng c\u1ee7a ch\u00fang. \u1ede tu\u1ed5i 150, n\u1ebfu b\u1ea1n xem x\u00e9t \u0111\u1ebfn s\u1ed1 tu\u1ed5i th\u1ecd c\u00f3 kh\u1ea3 n\u0103ng l\u00ean \u0111\u1ebfn h\u00e0ng ng\u00e0n n\u0103m c\u1ee7a lo\u00e0i n\u00e0y, th\u00ec ch\u00fang th\u1eadt ra ch\u1ec9 l\u00e0 m\u1ed9t \u0111\u00e1m tr\u1ebb con, \u0111ang l\u1edbn l\u00ean \u1edf \u0111\u00e2y, ngay t\u1ea1i ch\u00e2u \u00c2u n\u00e0y, xa gia \u0111\u00ecnh v\u00e0 cha m\u1eb9. Kh\u00f4ng c\u1eadu ch\u00fa, kh\u00f4ng c\u00f4 d\u00ec, kh\u00f4ng c\u00f3 tr\u01b0\u1eddng m\u1eabu gi\u00e1o \u0111\u1ea7y","ti\u1ebfng c\u01b0\u1eddi \u2013 kh\u00f4ng c\u00f3 g\u00ec h\u1ebft, c\u1ea3 \u0111\u1eddi ch\u00fang ph\u1ea3i s\u1ed1ng trong th\u1ebf nguy hi\u1ec3m. Th\u1ebf nh\u01b0ng trong c\u00f4ng vi\u00ean v\u1eabn c\u00f2n nhi\u1ec1u c\u00e2y kh\u00e1c m\u00e0? Ch\u1eb3ng l\u1ebd ch\u00fang kh\u00f4ng h\u00ecnh th\u00e0nh n\u00ean ho\u00e0n c\u1ea3nh gi\u1ed1ng nh\u01b0 m\u1ed9t khu r\u1eebng, v\u00e0 ch\u00fang kh\u00f4ng th\u1ec3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 cha m\u1eb9 thay th\u1ebf? Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m, v\u00ec v\u1eady ch\u00fang kh\u00f4ng th\u1ec3 h\u1ed7 tr\u1ee3 hay b\u1ea3o v\u1ec7 nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf b\u00e9 nh\u1ecf. B\u00ean c\u1ea1nh \u0111\u00f3, ch\u00fang l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y r\u1ea5t, r\u1ea5t kh\u00e1c bi\u1ec7t. \u0110\u1ec3 \u0111o\u1ea1n, s\u1ed3i, hay d\u1ebb gai nu\u00f4i l\u1edbn m\u1ed9t c\u00e2y g\u1ed7 \u0111\u1ecf th\u00ec c\u0169ng y nh\u01b0 \u0111\u1ec3 l\u0169 con n\u00edt lo\u00e0i ng\u01b0\u1eddi ch\u0103m s\u00f3c chu\u1ed9t nh\u1eaft, chu\u1ed9t t\u00fai hay c\u00e1 voi l\u01b0ng g\u00f9 v\u1eady. Ch\u1eafc ch\u1eafn l\u00e0 kh\u00f4ng \u1ed5n r\u1ed3i, n\u00ean nh\u1eefng c\u00e2y nh\u1ecf \u0111\u1ebfn t\u1eeb M\u1ef9 n\u00e0y ph\u1ea3i t\u1ef1 lo li\u1ec7u th\u00f4i. Kh\u00f4ng c\u00f3 m\u1eb9 s\u0103n s\u00f3c hay c\u1ea9n th\u1eadn tr\u00f4ng ch\u1eebng \u0111\u1ec3 ch\u00fang kh\u00f4ng ph\u00e1t tri\u1ec3n qu\u00e1 nhanh. Kh\u00f4ng c\u00f3 khu r\u1eebng d\u1ec5 ch\u1ecbu, \u00eam \u1ea3 v\u00e0 \u1ea9m \u01b0\u1edbt xung quanh ch\u00fang. Ch\u1eb3ng c\u00f3 g\u00ec h\u1ebft ngo\u1ea1i tr\u1eeb s\u1ef1 c\u00f4 \u0111\u1ed9c. Nh\u01b0 th\u1ec3 c\u00f2n ch\u01b0a \u0111\u1ee7 t\u1ec7, trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, \u0111\u1ea5t c\u00f2n l\u00e0 m\u1ed9t th\u1ea3m h\u1ecda ho\u00e0n to\u00e0n. Trong khi nh\u1eefng khu r\u1eebng nguy\u00ean sinh cung c\u1ea5p cho b\u1ed9 r\u1ec5 m\u1ecfng manh c\u1ee7a ch\u00fang lo\u1ea1i \u0111\u1ea5t m\u1ec1m, b\u1edf, gi\u00e0u m\u00f9n v\u00e0 lu\u00f4n \u1ea9m \u01b0\u1edbt, nh\u1eefng c\u00f4ng vi\u00ean \u1edf ch\u00e2u \u00c2u ch\u1ec9 c\u00f3 m\u1ed7i m\u1eb7t \u0111\u1ea5t c\u1ee9ng ng\u1eafc, ho\u00e0n to\u00e0n c\u1ea1n ki\u1ec7t ch\u1ea5t dinh d\u01b0\u1ee1ng v\u00e0 b\u1ecb n\u00e9n ch\u1eb7t sau nhi\u1ec1u n\u0103m \u0111\u00f4 th\u1ecb h\u00f3a. Th\u00eam n\u1eefa, ng\u01b0\u1eddi d\u00e2n th\u01b0\u1eddng th\u00edch \u0111\u1ebfn g\u1ea7n c\u00e2y, s\u1edd v\u1ecf ch\u00fang, v\u00e0 th\u01b0 gi\u00e3n trong b\u00f3ng r\u00e2m d\u01b0\u1edbi t\u00e1n c\u1ee7a ch\u00fang. Qua h\u00e0ng th\u1eadp k\u1ef7, vi\u1ec7c li\u00ean t\u1ee5c gi\u1eabm \u0111\u1ea1p quanh g\u1ed1c c\u00e2y khi\u1ebfn \u0111\u1ea5t c\u00e0ng b\u1ecb n\u00e9n ch\u1eb7t h\u01a1n n\u1eefa, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u01b0\u1edbc m\u01b0a s\u1ebd r\u00fat \u0111i nhanh qu\u00e1 m\u1ee9c, v\u00e0 trong m\u00f9a \u0111\u00f4ng, c\u00e2y kh\u00f4ng th\u1ec3 t\u00edch t\u1ee5 \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng n\u01b0\u1edbc d\u1ef1 tr\u1eef \u0111\u1ec3 s\u1ed1ng qua m\u00f9a h\u00e8. K\u1ef9 thu\u1eadt tr\u1ed3ng c\u00e2y c\u0169ng \u00e1m \u1ea3nh \u0111\u00e1m c\u00e2y n\u00e0y su\u1ed1t cu\u1ed9c \u0111\u1eddi c\u00f2n l\u1ea1i c\u1ee7a ch\u00fang. Ch\u00fang b\u1ecb gi\u1eef s\u1ed1ng v\u00e0 qu\u1ea3n l\u00fd \u1edf v\u01b0\u1eddn \u01b0\u01a1m trong nhi\u1ec1u n\u0103m tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn \u0111\u1ecba \u0111i\u1ec3m cu\u1ed1i c\u00f9ng. M\u1ed7i m\u00f9a thu, r\u1ec5 c\u1ee7a ch\u00fang \u0111\u1ec1u b\u1ecb t\u1ec9a b\u1edbt \u0111\u1ec3 v\u1eabn chen v\u1eeba trong gi\u1ecf \u01b0\u01a1m, \u0111\u1eb7ng sau n\u00e0y c\u00f2n c\u00f3 th\u1ec3 di chuy\u1ec3n ch\u00fang d\u1ec5 d\u00e0ng. B\u1ea7u r\u1ec5 \u2013 th\u1ee9 s\u1ebd c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 20 feet (6,096 m) \u1edf m\u1ed9t c\u00e2y cao kho\u1ea3ng 10 feet (3,048 m) n\u1ebfu c\u00e2y \u1ea5y \u0111\u01b0\u1ee3c t\u1ef1 s\u1ed1ng theo \u00fd m\u00ecnh, b\u1ecb c\u1eaft ch\u1ec9 c\u00f2n kho\u1ea3ng 20 inch (50,8 cm), v\u00e0 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o","t\u00e1n s\u1ebd kh\u00f4ng h\u00e9o r\u0169 v\u00ec kh\u00e1t do r\u1ec5 b\u1ecb t\u1ec9a b\u1edbt, ngay c\u1ea3 t\u00e1n c\u00e2y c\u0169ng b\u1ecb th\u1eb3ng tay c\u1eaft b\u1edbt. V\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c l\u00e0m kh\u00f4ng ph\u1ea3i \u0111\u1ec3 c\u1ea3i thi\u1ec7n s\u1ee9c kh\u1ecfe c\u1ee7a c\u00e2y, m\u00e0 \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u1ec3 d\u1ec5 qu\u1ea3n l\u00fd c\u00e2y h\u01a1n th\u00f4i. Th\u1eadt kh\u00f4ng may, khi r\u1ec5 b\u1ecb x\u00e9n b\u1edbt, k\u1ebft c\u1ea5u t\u01b0\u01a1ng t\u1ef1 nh\u01b0 b\u1ed9 n\u00e3o c\u0169ng s\u1ebd b\u1ecb c\u1eaft \u0111i c\u00f9ng v\u1edbi nh\u1eefng \u0111\u1ea7u r\u1ec5 nh\u1ea1y c\u1ea3m. \u1ed0i! Sau \u0111\u00f3, d\u01b0\u1eddng nh\u01b0 vi\u1ec7c can thi\u1ec7p n\u00e0y khi\u1ebfn c\u00e2y m\u1ea5t \u0111i c\u1ea3m gi\u00e1c ph\u01b0\u01a1ng h\u01b0\u1edbng d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t. Ch\u00fang kh\u00f4ng m\u1ecdc r\u1ec5 c\u1eafm xu\u1ed1ng \u0111\u1ea5t n\u1eefa, thay v\u00e0o \u0111\u00f3, ch\u00fang l\u1ea1i h\u00ecnh th\u00e0nh m\u1ed9t chi\u1ebfc d\u0129a r\u1ec5 ph\u1eb3ng n\u1eb1m g\u1ea7n m\u1eb7t \u0111\u1ea5t, v\u00e0 \u0111i\u1ec1u n\u00e0y h\u1ea1n ch\u1ebf nghi\u00eam tr\u1ecdng kh\u1ea3 n\u0103ng c\u00e2y ki\u1ebfm n\u01b0\u1edbc c\u00f9ng th\u1ee9c \u0103n. M\u1edbi \u0111\u1ea7u, nh\u1eefng c\u00e2y non d\u01b0\u1eddng nh\u01b0 ch\u1eb3ng b\u1eadn t\u00e2m. Ch\u00fang nh\u1ed3i nh\u00e9t b\u1ea3n th\u00e2n v\u1edbi nh\u1eefng m\u00f3n qu\u00e0 v\u1eb7t gi\u00e0u \u0111\u01b0\u1eddng v\u00ec ch\u00fang c\u00f3 th\u1ec3 quang h\u1ee3p bao nhi\u00eau t\u00f9y th\u00edch d\u01b0\u1edbi \u00e1nh m\u1eb7t tr\u1eddi tr\u00e0n ng\u1eadp. Qu\u00e1 d\u1ec5 \u0111\u1ec3 v\u01b0\u1ee3t qua vi\u1ec7c m\u1ea5t \u0111i b\u00e0n tay ch\u0103m s\u00f3c d\u1ecbu d\u00e0ng c\u1ee7a m\u1eb9. V\u00e0 trong nh\u1eefng n\u0103m \u0111\u1ea7u, r\u1eafc r\u1ed1i v\u1ec1 n\u01b0\u1edbc \u1edf n\u01a1i \u0111\u1ea5t c\u1ee9ng nh\u01b0 \u0111\u00e1 s\u1ebd hi\u1ebfm khi \u0111\u01b0\u1ee3c ch\u00fa \u00fd \u0111\u1ebfn. X\u00e9t cho c\u00f9ng, nh\u1eefng c\u00e2y non n\u00e0y \u0111\u01b0\u1ee3c nh\u1eefng ng\u01b0\u1eddi l\u00e0m v\u01b0\u1eddn tr\u00f4ng nom \u00e2n c\u1ea7n v\u00e0 t\u01b0\u1edbi n\u01b0\u1edbc h\u00e0ng ng\u00e0y khi ch\u00fang b\u1ecb kh\u00f4 n\u01b0\u1edbc c\u01a1 m\u00e0. Nh\u01b0ng quan tr\u1ecdng l\u00e0 kh\u00f4ng c\u00f3 k\u1ef7 lu\u1eadt nghi\u00eam kh\u1eafc. Kh\u00f4ng c\u00f3 \u201cT\u1eeb t\u1eeb th\u00f4i\u201d, kh\u00f4ng c\u00f3 \u201cCh\u1edd th\u00eam v\u00e0i tr\u0103m n\u0103m n\u1eefa \u0111\u00e3\u201d, kh\u00f4ng b\u1ecb thi\u1ebfu \u00e1nh s\u00e1ng nghi\u00eam tr\u1ecdng n\u1ebfu b\u1ea1n kh\u00f4ng m\u1ecdc th\u1eb3ng t\u1eafp. M\u1ed7i c\u00e2y non \u0111\u1ec1u c\u00f3 th\u1ec3 l\u00e0m g\u00ec t\u00f9y th\u00edch. V\u00ec th\u1ebf, m\u1ed7i n\u0103m, ch\u00fang \u0111\u1ec1u c\u1ed1 ph\u00e1t tri\u1ec3n h\u1ebft t\u1ed1c l\u1ef1c nh\u01b0 th\u1ec3 ch\u00fang \u0111ang trong tr\u01b0\u1eddng \u0111ua v\u1eady, v\u00e0 m\u1ed7i n\u0103m, ch\u00fang l\u1ea1i c\u00f3 m\u1ed9t \u0111\u1ee3t ph\u00e1t tri\u1ec3n th\u1ec3 ch\u1ea5t. Sau khi \u0111\u1ea1t \u0111\u01b0\u1ee3c chi\u1ec1u cao nh\u1ea5t \u0111\u1ecbnh, \u0111i\u1ec3m th\u01b0\u1edfng d\u00e0nh cho thu\u1edf \u1ea5u th\u01a1 d\u01b0\u1eddng nh\u01b0 \u0111\u00e3 b\u1ecb c\u00e2y d\u00f9ng h\u1ebft. T\u01b0\u1edbi h\u1ebft \u0111\u00e1m c\u00e2y cao \u0111\u1ebfn 65 feet (19,812 m) s\u1ebd t\u1ed1n m\u1ed9t l\u01b0\u1ee3ng n\u01b0\u1edbc c\u00f9ng l\u01b0\u1ee3ng th\u1eddi gian kh\u1ed5ng l\u1ed3. \u0110\u1ec3 l\u00e0m \u1ea9m r\u1ec5 c\u00e2y ho\u00e0n to\u00e0n, nh\u1eefng ng\u01b0\u1eddi th\u1ee3 l\u00e0m v\u01b0\u1eddn ph\u1ea3i d\u00f9ng \u1ed1ng x\u1ecbt h\u00e0ng gallon n\u01b0\u1edbc cho t\u1eebng c\u00e2y m\u1ed9t! V\u00e0 th\u1ebf l\u00e0, m\u1ed9t ng\u00e0y n\u00e0o \u0111\u00f3, vi\u1ec7c ch\u0103m s\u00f3c \u0111\u01a1n gi\u1ea3n d\u1eebng l\u1ea1i. Tho\u1ea1t \u0111\u1ea7u, nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf kh\u1ed5ng l\u1ed3 ch\u1eb3ng th\u1ef1c s\u1ef1 ch\u00fa \u00fd \u0111\u1ebfn. Ch\u00fang \u0111\u00e3 s\u1ed1ng trong nhung l\u1ee5a h\u00e0ng th\u1eadp k\u1ef7 v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m m\u1ecdi th\u1ee9 ch\u00fang mu\u1ed1n. Th\u00e2n c\u00e2y to m\u1eadp c\u1ee7a ch\u00fang y h\u1ec7t nh\u01b0 nh\u1eefng chi\u1ebfc b\u1ee5ng ph\u1ec7 \u201cminh ch\u1ee9ng\u201d cho b\u1eefa ch\u00e8 ch\u00e9n cu\u1ed3ng","hoan d\u01b0\u1edbi s\u1ef1 nu\u00f4ng chi\u1ec1u c\u1ee7a \u00e1nh m\u1eb7t tr\u1eddi. V\u00e0o nh\u1eefng n\u0103m \u0111\u1ea7u, th\u1ef1c s\u1ef1 kh\u00f4ng th\u00e0nh v\u1ea5n \u0111\u1ec1 v\u00ec c\u00e1c t\u1ebf b\u00e0o trong th\u00e2n c\u00e2y r\u1ea5t l\u1edbn, ch\u1ee9a r\u1ea5t nhi\u1ec1u kh\u00f4ng kh\u00ed, do \u0111\u00f3 kh\u00f4ng d\u1ec5 b\u1ecb nhi\u1ec5m n\u1ea5m. Nh\u1eefng c\u00e0nh b\u00ean c\u0169ng cho th\u1ea5y h\u00e0nh vi c\u1ee5c c\u1eb1n c\u1ee7a ch\u00fang. Nh\u1eefng c\u00e2y s\u1ed1ng trong c\u00f4ng vi\u00ean ch\u1eb3ng bi\u1ebft g\u00ec v\u1ec1 \u201cs\u1ed5 tay quy \u01b0\u1edbc\u201d \u2013 th\u1ee9 d\u1eabn b\u01b0\u1edbc cho c\u00e2y trong nh\u1eefng khu r\u1eebng nguy\u00ean sinh, y\u00eau c\u1ea7u nh\u1eefng ch\u1ed7 th\u1ea5p tr\u00ean c\u00e2y ch\u1ec9 \u0111\u01b0\u1ee3c m\u1ecdc nh\u1eefng c\u00e0nh m\u1ea3nh kh\u1ea3nh, ho\u1eb7c th\u1eadm ch\u00ed kh\u00f4ng \u0111\u01b0\u1ee3c m\u1ecdc b\u1ea5t c\u1ee9 c\u00e0nh n\u00e0o. Nh\u1edd c\u00f3 l\u01b0\u1ee3ng \u00e1nh s\u00e1ng phong ph\u00fa chi\u1ebfu \u0111\u1ebfn t\u1eadn m\u1eb7t \u0111\u1ea5t, nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf n\u00e0y m\u1ecdc nh\u1eefng c\u00e0nh b\u00ean to ch\u1eafc khi\u1ebfn sau \u0111\u00f3 chu vi th\u00e2n c\u00e2y t\u0103ng nhi\u1ec1u \u0111\u1ebfn n\u1ed7i nh\u00ecn c\u00e2y l\u00e0m b\u1ea1n li\u00ean t\u01b0\u1edfng \u0111\u1ebfn nh\u1eefng v\u1eadn \u0111\u1ed9ng vi\u00ean th\u1ec3 h\u00ecnh \u0111ang say thu\u1ed1c. \u0110\u00fang l\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng c\u00e0nh m\u1ecdc th\u1ea5p h\u01a1n 6 \u0111\u1ebfn 10 feet (1,828 \u2013 3,048 m) tr\u00ean c\u00e2y th\u01b0\u1eddng b\u1ecb th\u1ee3 l\u00e0m v\u01b0\u1eddn c\u01b0a b\u1ecf \u0111\u1ec3 t\u1ea1o t\u1ea7m nh\u00ecn th\u00f4ng tho\u00e1ng trong c\u00f4ng vi\u00ean cho kh\u00e1ch tham quan, nh\u01b0ng n\u1ebfu so s\u00e1nh v\u1edbi nh\u1eefng khu r\u1eebng nguy\u00ean sinh \u2013 n\u01a1i m\u00e0 nh\u1eefng c\u00e0nh to ch\u1eafc kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p m\u1ecdc th\u1ea5p h\u01a1n 65 feet (19,812 m) v\u00e0 th\u1ec9nh tho\u1ea3ng th\u1eadm ch\u00ed kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ea5p h\u01a1n 165 feet (50,292 m), th\u00ec m\u1ea5y c\u00e2y n\u00e0y r\u00f5 l\u00e0 sinh tr\u01b0\u1edfng \u201csa \u0111\u1ecda\u201d s\u1edd s\u1edd ra \u0111\u1ea5y r\u1ed3i. Cu\u1ed1i c\u00f9ng th\u00ec c\u00e2y s\u1ebd c\u00f3 th\u00e2n m\u1eadp, l\u00f9n v\u1edbi t\u00e1n l\u00e1 b\u00ean tr\u00ean. B\u1eb1ng ch\u1ee9ng r\u00f5 nh\u1ea5t cho th\u1ea5y c\u00e2y s\u1ed1ng \u1edf c\u00f4ng vi\u00ean ch\u00ednh l\u00e0 t\u00e1n. R\u1ec5 c\u1ee7a ch\u00fang kh\u00f4ng c\u1eafm s\u00e2u h\u01a1n 20 inch (50,8 cm) v\u00e0o ch\u1ed7 \u0111\u1ea5t b\u1ecb gi\u1eabm \u0111\u1ea1p n\u1eb7ng n\u1ec1, do \u0111\u00f3, nh\u1eefng b\u1ed9 r\u1ec5 n\u00e0y h\u1ed7 tr\u1ee3 r\u1ea5t \u00edt cho c\u00e2y. \u0110i\u1ec1u \u0111\u00f3 r\u1ea5t nguy hi\u1ec3m, v\u00e0 c\u00e2y c\u00f3 chi\u1ec1u cao b\u00ecnh th\u01b0\u1eddng s\u1ebd tr\u1edf n\u00ean lung lay qu\u00e1 m\u1ee9c. Th\u00f3i quen sinh tr\u01b0\u1edfng c\u1ee7a nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf trong c\u00e1c khu r\u1eebng nguy\u00ean sinh xa x\u00f4i s\u1ebd gi\u1eef v\u1eefng tr\u1ecdng t\u00e2m n\u01a1i th\u1ea5p, v\u00ec v\u1eady ch\u00fang kh\u00e1 v\u1eefng ch\u00e3i. Ph\u1ea3i c\u00f3 b\u00e3o l\u1edbn m\u1edbi ph\u00e1 v\u1ee1 n\u1ed5i s\u1ef1 th\u0103ng b\u1eb1ng \u1edf ch\u00fang. M\u1ed9t khi nh\u1eefng c\u00e2y g\u1ed7 \u0111\u1ecf ch\u00e2u \u00c2u v\u01b0\u1ee3t qua m\u1ed1c m\u1ed9t tr\u0103m n\u0103m (l\u00fac \u1ea5y, c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi nh\u1eefng \u0111\u1ee9a b\u00e9 \u0111ang tu\u1ed5i \u0111\u1ebfn tr\u01b0\u1eddng), cu\u1ed9c s\u1ed1ng tho\u1ea3i m\u00e1i k\u1ebft th\u00fac. Nh\u1eefng c\u00e0nh c\u00e2y cao nh\u1ea5t h\u00e9o qu\u1eaft l\u1ea1i, v\u00e0 d\u00f9 cho c\u00e2y c\u1ed1 g\u1eafng l\u1edbn l\u00ean nhi\u1ec1u \u0111\u1ebfn m\u1ee9c n\u00e0o \u0111i ch\u0103ng n\u1eefa, th\u00ec ch\u00fang c\u0169ng \u0111\u00e3 \u0111i \u0111\u1ebfn cu\u1ed1i con \u0111\u01b0\u1eddng r\u1ed3i. G\u1ed7 c\u1ee7a c\u00e2y b\u1ecb ng\u00e2m t\u1ea9m trong c\u00e1c ch\u1ea5t di\u1ec7t n\u1ea5m t\u1ef1 nhi\u00ean, v\u00ec v\u1eady ch\u00fang","v\u1eabn c\u00f3 th\u1ec3 s\u1ed1ng qua nhi\u1ec1u th\u1eadp k\u1ef7 n\u1eefa d\u00f9 cho v\u1ecf ch\u00fang c\u00f3 b\u1ecb th\u01b0\u01a1ng. \u0110i\u1ec1u n\u00e0y kh\u00e1 b\u1ea5t \u0111\u1ed3ng v\u1edbi nh\u1eefng lo\u00e0i c\u00e2y kh\u00e1c. V\u00ed d\u1ee5, d\u1ebb gai s\u1ebd ph\u1ea3n \u1ee9ng x\u1ea5u khi nh\u1eefng c\u00e0nh c\u00e2y to ch\u1eafc b\u1ecb c\u01b0a m\u1ea5t. L\u1ea7n t\u1edbi, khi b\u1ea1n \u0111i d\u1ea1o trong c\u00f4ng vi\u00ean, h\u00e3y quan s\u00e1t k\u1ef9 h\u01a1n. B\u1ea1n s\u1ebd th\u1ea5y hi\u1ebfm c\u00f3 c\u00e2y r\u1ee5ng l\u00e1 to l\u1edbn n\u00e0o kh\u00f4ng cho th\u1ea5y d\u1ea5u hi\u1ec7u c\u00e0nh t\u1eebng b\u1ecb t\u1ec9a, c\u01b0a, ho\u1eb7c can thi\u1ec7p b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c. Vi\u1ec7c \u201ct\u1ec9a x\u00e9n\u201d n\u00e0y (th\u1ef1c s\u1ef1 th\u00ec n\u00f3 gi\u1ed1ng \u201cth\u1ea3m s\u00e1t\u201d h\u01a1n) th\u01b0\u1eddng ch\u1ec9 v\u00ec l\u00fd do th\u1ea9m m\u1ef9 \u2013 th\u1ee9 \u201cra l\u1ec7nh\u201d r\u1eb1ng t\u00e1n c\u1ee7a c\u00e1c c\u00e2y n\u1eb1m d\u1ecdc theo l\u1ed1i \u0111i b\u1ed9 hay \u0111\u01b0\u1eddng v\u00e0o nh\u00e0 ph\u1ea3i c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u00e1ng. T\u00e1n b\u1ecb t\u1ec9a x\u00e9n nghi\u00eam tr\u1ecdng l\u00e0 c\u00fa \u0111\u00e1nh n\u1eb7ng n\u1ec1 v\u00e0o b\u1ed9 r\u1ec5 \u2013 th\u1ee9 ph\u00e1t tri\u1ec3n l\u00ean k\u00edch th\u01b0\u1edbc t\u1ed1i \u01b0u ph\u00f9 h\u1ee3p cho vi\u1ec7c ph\u1ee5c v\u1ee5 nh\u1eefng ph\u1ea7n n\u1eb1m tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a c\u00e2y. N\u1ebfu c\u00f3 m\u1ed9t t\u1ef7 l\u1ec7 l\u1edbn c\u00e1c c\u00e0nh b\u1ecb ch\u1eb7t b\u1ecf khi\u1ebfn m\u1ee9c quang h\u1ee3p gi\u1ea3m xu\u1ed1ng, th\u00ec s\u1ebd c\u00f3 m\u1ed9t t\u1ef7 l\u1ec7 t\u01b0\u01a1ng \u1ee9ng c\u00e1c ph\u1ea7n d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t c\u1ee7a c\u00e2y b\u1ecb ch\u1ebft \u0111\u00f3i. N\u1ea5m gi\u1edd s\u1ebd x\u00e2m nh\u1eadp v\u00e0o ph\u1ea7n g\u1ed1c ch\u1ebft \u2013 n\u01a1i c\u00e0nh b\u1ecb ch\u1eb7t b\u1ecf v\u00e0 th\u00e2n c\u00e2y b\u1ecb c\u01b0a \u0111i. Ph\u1ea7n g\u1ed7 ch\u1ee9a \u0111\u1ea7y c\u00e1c t\u00fai kh\u00ed do c\u00e2y l\u1edbn qu\u00e1 nhanh l\u00fac c\u00f2n non, v\u00e0 th\u1ebf l\u00e0 n\u1ea5m \u0111\u01b0\u1ee3c d\u1ecbp vui v\u1ebb. Ch\u1ec9 sau v\u00e0i th\u1eadp k\u1ef7 \u2013 th\u1eddi gian n\u00e0y l\u00e0 c\u1ef1c k\u1ef3 nhanh \u0111\u1ed1i v\u1edbi c\u00e2y \u2013 ph\u1ea7n b\u1ecb m\u1ee5c n\u00e1t b\u00ean trong s\u1ebd l\u1ed9 ra ph\u00eda ngo\u00e0i c\u1ee7a c\u00e2y. To\u00e0n b\u1ed9 c\u00e1c ph\u1ea7n tr\u00ean t\u00e1n l\u00e1 s\u1ebd ch\u1ebft d\u1ea7n cho \u0111\u1ebfn khi nh\u00e0 ch\u1ee9c tr\u00e1ch \u0111\u1ecba ph\u01b0\u01a1ng c\u1eaft s\u1ea1ch lu\u00f4n t\u00e1n \u0111\u1ec3 tr\u00e1nh nguy hi\u1ec3m cho kh\u00e1ch tham quan, \u0111\u1ec3 l\u1ea1i nh\u1eefng v\u1ebft th\u01b0\u01a1ng kh\u1ed5ng l\u1ed3 t\u1ea1i n\u01a1i c\u00e2y b\u1ecb t\u1ec9a ng\u1ecdn. Ch\u1ea5t s\u00e1p s\u1ebd \u0111\u01b0\u1ee3c s\u01a1n l\u00ean th\u00e2n c\u00e2y b\u1ecb h\u01b0 h\u1ea1i, v\u1ed1n \u0111\u01b0\u1ee3c cho l\u00e0 s\u1ebd b\u1ea3o v\u1ec7 c\u00e2y, l\u1ea1i th\u01b0\u1eddng \u0111\u1ea9y nhanh c\u00e2y \u0111\u1ebfn c\u00e1i ch\u1ebft v\u00ec ch\u00fang gi\u1eef h\u01a1i \u1ea9m l\u1ea1i b\u00ean trong, t\u1ea1o ra m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt m\u00e0 n\u1ea5m y\u00eau th\u00edch. Cu\u1ed1i c\u00f9ng, t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec c\u00f2n l\u1ea1i l\u00e0 m\u1ed9t chi\u1ebfc v\u1ecf r\u1ed7ng kh\u00f4ng c\u00f2n c\u1ee9u ch\u1eefa \u0111\u01b0\u1ee3c n\u1eefa, v\u00e0 m\u1ed9t ng\u00e0y n\u00e0o \u0111\u00f3 c\u00e2y s\u1ebd b\u1ecb \u0111\u1ed1n h\u1ea1. V\u00ec kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 th\u00e0nh vi\u00ean gia \u0111\u00ecnh n\u00e0o v\u1ed9i \u0111\u1ebfn gi\u00fap \u0111\u1ee1 nh\u1eefng c\u00e2y s\u1ed1ng \u1edf th\u00e0nh th\u1ecb n\u00e0y, g\u1ed1c c\u00e2y c\u00f2n l\u1ea1i sau khi \u0111\u1ed1n s\u1ebd ch\u1ebft \u0111i ho\u00e0n to\u00e0n v\u00e0 nhanh ch\u00f3ng. Ch\u1ec9 m\u1ed9t th\u1eddi gian r\u1ea5t ng\u1eafn sau \u0111\u00f3, m\u1ed9t c\u00e2y m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c tr\u1ed3ng v\u00e0o \u0111\u1ea5y v\u00e0 tu\u1ed3ng k\u1ecbch s\u1ebd b\u1eaft \u0111\u1ea7u l\u1ea1i t\u1eeb \u0111\u1ea7u. Nh\u1eefng c\u00e2y n\u01a1i th\u1ecb th\u00e0nh ch\u00ednh l\u00e0 nh\u1eefng \u0111\u1ee9a tr\u1ebb \u0111\u01b0\u1eddng ph\u1ed1 \u0111\u1ed1i v\u1edbi r\u1eebng r\u1eadm. M\u1ed9t s\u1ed1 c\u00e2y l\u1edbn l\u00ean \u1edf nh\u1eefng \u0111\u1ecba \u0111i\u1ec3m khi\u1ebfn","c\u00e1ch g\u1ecdi n\u00e0y th\u1eadm ch\u00ed c\u00f2n ch\u00ednh x\u00e1c h\u01a1n \u2013 ngay tr\u00ean \u0111\u01b0\u1eddng ph\u1ed1. V\u00e0i th\u1eadp k\u1ef7 \u0111\u1ea7u \u0111\u1eddi c\u1ee7a ch\u00fang t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c \u0111\u1ed3ng lo\u1ea1i \u1edf c\u00e1c c\u00f4ng vi\u00ean. Ch\u00fang \u0111\u01b0\u1ee3c nu\u00f4ng chi\u1ec1u v\u00e0 ch\u0103m ch\u00fat. Th\u1ec9nh tho\u1ea3ng ch\u00fang th\u1eadm ch\u00ed c\u00f2n c\u00f3 \u0111\u01b0\u1eddng t\u01b0\u1edbi n\u01b0\u1edbc c\u00e1 nh\u00e2n v\u00e0 l\u1ecbch t\u01b0\u1edbi n\u01b0\u1edbc theo y\u00eau c\u1ea7u c\u1ee7a ri\u00eang ch\u00fang. Khi r\u1ec5 c\u1ee7a c\u00e2y mu\u1ed1n \u0111i ra ngo\u00e0i v\u00e0 th\u00e0nh l\u1eadp l\u00e3nh th\u1ed5 m\u1edbi, m\u1ed9t s\u1ef1 ng\u1ea1c nhi\u00ean to l\u1edbn \u0111ang ch\u1edd \u0111\u00f3n ch\u00fang. \u0110\u1ea5t d\u01b0\u1edbi l\u00f2ng \u0111\u01b0\u1eddng v\u00e0 l\u1ec1 \u0111i b\u1ed9 th\u1eadm ch\u00ed c\u00f2n c\u1ee9ng h\u01a1n \u0111\u1ea5t trong c\u00f4ng vi\u00ean do b\u1ecb n\u00e9n b\u1edfi m\u00e1y m\u00f3c c\u00f3 c\u00e1c t\u1ea5m rung kim lo\u1ea1i l\u1edbn. \u0110\u00f3 l\u00e0 s\u1ef1 th\u1ea5t v\u1ecdng tr\u00e0n tr\u1ec1 \u0111\u1ed1i v\u1edbi c\u00e2y. R\u1ec5 c\u1ee7a nh\u1eefng c\u00e2y trong r\u1eebng th\u1ef1c s\u1ef1 kh\u00f4ng m\u1ecdc qu\u00e1 s\u00e2u. R\u1ea5t \u00edt lo\u00e0i c\u00f3 r\u1ec5 m\u1ecdc s\u00e2u h\u01a1n 5 feet (1,524 m), v\u00e0 ph\u1ea7n l\u1edbn c\u00e1c lo\u00e0i \u0111\u1ec1u s\u1edbm ng\u1eebng ph\u00e1t tri\u1ec3n r\u1ec5 s\u00e2u h\u01a1n xu\u1ed1ng \u0111\u1ea5t. \u0110i\u1ec1u \u0111\u00f3 kh\u00f4ng th\u00e0nh v\u1ea5n \u0111\u1ec1 trong r\u1eebng \u2013 n\u01a1i h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 gi\u1edbi h\u1ea1n v\u1ec1 chi\u1ec1u r\u1ed9ng m\u00e0 r\u1ec5 c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n. Th\u1eadt kh\u00f4ng may, \u1edf b\u00ean \u0111\u01b0\u1eddng th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c nh\u01b0 th\u1ebf. L\u00f2ng \u0111\u01b0\u1eddng h\u1ea1n ch\u1ebf r\u1ec5 ph\u00e1t tri\u1ec3n v\u1ec1 m\u1ed9t h\u01b0\u1edbng, c\u00f3 c\u00e1c \u1ed1ng d\u1eabn b\u00ean d\u01b0\u1edbi khu v\u1ef1c d\u00e0nh cho ng\u01b0\u1eddi \u0111i b\u1ed9, v\u00e0 \u0111\u1ea5t th\u00ec b\u1ecb n\u00e9n ch\u1eb7t trong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng. Khi c\u00e2y b\u1ecb tr\u1ed3ng \u1edf nh\u1eefng kh\u00f4ng gian g\u00f2 b\u00f3 n\u00e0y, xung \u0111\u1ed9t l\u00e0 kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi. Trong nh\u1eefng n\u01a1i nh\u01b0 v\u1eady, ti\u00eau huy\u1ec1n, phong, v\u00e0 \u0111o\u1ea1n s\u1ebd th\u0103m d\u00f2 nh\u1eefng \u1ed1ng d\u1eabn n\u01b0\u1edbc th\u1ea3i d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t. Ch\u00fang ta ch\u1ec9 nh\u1eadn th\u1ea5y \u0111\u01b0\u1ee3c thi\u1ec7t h\u1ea1i khi c\u01a1n b\u00e3o k\u1ebf ti\u1ebfp \u1eadp \u0111\u1ebfn v\u00e0 \u0111\u01b0\u1eddng ph\u1ed1 l\u00eanh l\u00e1ng n\u01b0\u1edbc. Th\u1ebf r\u1ed3i c\u00e1c chuy\u00ean gia \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c d\u1ee5ng c\u1ee5 th\u0103m d\u00f2 r\u1ec5 c\u00e2y s\u1ebd \u0111\u1ebfn \u0111i\u1ec1u tra xem c\u00e2y n\u00e0o l\u00e0m t\u1eafc ngh\u1ebdn \u0111\u01b0\u1eddng \u1ed1ng. Th\u1ee7 ph\u1ea1m s\u1ebd b\u1ecb ph\u00e1n t\u1eed h\u00ecnh v\u00ec \u0111\u00e3 du ngo\u1ea1n b\u00ean d\u01b0\u1edbi v\u1ec9a h\u00e8 v\u00e0 b\u01b0\u1edbc l\u1ea7m v\u00e0o n\u01a1i m\u00e0 ch\u00fang c\u1ee9 t\u01b0\u1edfng l\u00e0 thi\u00ean \u0111\u01b0\u1eddng. C\u00e2y ph\u1ea1m t\u1ed9i s\u1ebd b\u1ecb ch\u1eb7t b\u1ecf, v\u00e0 k\u1ebb k\u1ebf th\u1eeba n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c tr\u1ed3ng trong m\u1ed9t khung b\u1ecdc r\u1ec5 d\u00ednh li\u1ec1n nh\u1eb1m ng\u0103n c\u1ea3n h\u00e0nh vi t\u01b0\u01a1ng t\u1ef1 trong t\u01b0\u01a1ng lai. V\u1eady sao t\u1eeb \u0111\u1ea7u c\u00e2y l\u1ea1i m\u1ecdc v\u00e0o trong c\u00e1c \u1ed1ng d\u1eabn? Trong m\u1ed9t th\u1eddi gian d\u00e0i, c\u00e1c k\u1ef9 s\u01b0 th\u00e0nh ph\u1ed1 \u0111\u00e3 ngh\u0129 r\u1eb1ng r\u1ec5 c\u00e2y b\u1eb1ng c\u00e1ch n\u00e0o \u0111\u00f3 b\u1ecb h\u1ea5p d\u1eabn b\u1edfi h\u01a1i \u1ea9m r\u1ec9 ra t\u1eeb nh\u1eefng ch\u1ed7 n\u1ed1i l\u1ecfng l\u1ebbo gi\u1eefa c\u00e1c \u1ed1ng d\u1eabn ho\u1eb7c b\u1edfi ch\u1ea5t dinh d\u01b0\u1ee1ng c\u00f3 trong n\u01b0\u1edbc th\u1ea3i. Tuy nhi\u00ean, k\u1ebft qu\u1ea3 c\u1ee7a m\u1ed9t nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh b\u1edfi \u0110\u1ea1i h\u1ecdc Ruhr-Bochum \u0111\u00e3 ch\u1ec9 ra m\u1ed9t h\u01b0\u1edbng nh\u00ecn ho\u00e0n","to\u00e0n kh\u00e1c. Nghi\u00ean c\u1ee9u n\u00e0y ph\u00e1t hi\u1ec7n r\u1ec5 c\u00e2y trong c\u00e1c \u1ed1ng d\u1eabn lu\u00f4n m\u1ecdc ph\u00eda tr\u00ean m\u1eb7t n\u01b0\u1edbc v\u00e0 d\u01b0\u1eddng nh\u01b0 ch\u1eb3ng h\u1ec1 h\u1ee9ng th\u00fa v\u1edbi l\u01b0\u1ee3ng dinh d\u01b0\u1ee1ng b\u1ed5 sung b\u00ean d\u01b0\u1edbi. Th\u1ee9 h\u1ea5p d\u1eabn ch\u00fang ch\u00ednh l\u00e0 ch\u1ed7 \u0111\u1ea5t t\u01a1i x\u1ed1p ch\u01b0a b\u1ecb n\u00e9n ch\u1eb7t ho\u00e0n to\u00e0n sau x\u00e2y d\u1ef1ng. \u1ede \u0111\u00e2y, r\u1ec5 c\u00e2y t\u00ecm \u0111\u01b0\u1ee3c ch\u1ed7 tr\u1ed1ng \u0111\u1ec3 th\u1edf v\u00e0 ph\u00e1t tri\u1ec3n. Ch\u00fang ch\u1ec9 t\u00ecnh c\u1edd x\u00e2m nh\u1eadp qua m\u1ed1i h\u00e0n gi\u1eefa t\u1eebng \u0111o\u1ea1n ri\u00eang l\u1ebb c\u1ee7a \u1ed1ng d\u1eabn, r\u1ed3i cu\u1ed1i c\u00f9ng ho\u00e0nh h\u00e0nh b\u1eeba b\u00e3i b\u00ean trong \u1ed1ng. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 khi nh\u1eefng c\u00e2y s\u1ed1ng \u1edf khu v\u1ef1c \u0111\u00f4 th\u1ecb xoay \u0111\u1ebfn \u0111\u00e2u c\u0169ng g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi n\u1ec1n \u0111\u1ea5t c\u1ee9ng nh\u01b0 b\u00ea t\u00f4ng, ch\u00fang tr\u1edf n\u00ean tuy\u1ec7t v\u1ecdng, v\u00e0 \u0111\u00e0nh ph\u1ea3i t\u00ecm l\u1ed1i tho\u00e1t \u1edf n\u01a1i m\u01b0\u01a1ng r\u00e3nh l\u1ea5p \u0111\u1ea7y \u0111\u1ea5t nh\u1ebfch nh\u00e1c nh\u01b0 l\u00e0 ph\u01b0\u01a1ng k\u1ebf cu\u1ed1i c\u00f9ng. M\u1ed9t khi ch\u00fang \u0111\u1ebfn \u0111\u00f3, ch\u00fang l\u1ea1i tr\u1edf th\u00e0nh v\u1ea5n \u0111\u1ec1 r\u1eafc r\u1ed1i. C\u00e2y kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 \u201cs\u1eeda ch\u1eefa\u201d, ch\u1ec9 c\u00f3 m\u1ed7i \u1ed1ng d\u1eabn m\u1edbi \u0111\u01b0\u1ee3c m\u00e0 th\u00f4i \u2013 th\u1ee9 gi\u1edd \u0111\u00e2y \u0111\u01b0\u1ee3c ch\u00f4n tr\u1edf l\u1ea1i xu\u1ed1ng ch\u1ed7 \u0111\u1ea5t \u0111\u01b0\u1ee3c n\u1ec7n \u0111\u1eb7c bi\u1ec7t ch\u1eb7t \u0111\u1ec3 r\u1ec5 c\u00e2y kh\u00f4ng c\u00f2n c\u00f3 th\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c n\u01a1i \u201c\u0111\u1eb7t ch\u00e2n\u201d \u1edf \u0111\u00f3 n\u1eefa. B\u1ea1n c\u00f3 ng\u1ea1c nhi\u00ean kh\u00f4ng khi bi\u1ebft nh\u1eefng c\u01a1n b\u00e3o m\u00f9a h\u00e8 qu\u1eadt ng\u00e3 s\u1ed1 l\u01b0\u1ee3ng c\u00e2y \u0111\u1eb7c bi\u1ec7t l\u1edbn \u1edf \u0111\u01b0\u1eddng ph\u1ed1? H\u1ec7 th\u1ed1ng \u201cneo \u0111\u1eadu\u201d ng\u1ea7m d\u01b0\u1edbi \u0111\u1ea5t y\u1ebfu \u1edbt c\u1ee7a ch\u00fang \u2013 th\u1ee9 m\u00e0 n\u1ebfu \u1edf thi\u00ean nhi\u00ean th\u00ec c\u00f3 th\u1ec3 bao ph\u1ee7 h\u01a1n 700 yard vu\u00f4ng (585,289 m) nh\u01b0ng gi\u1edd l\u1ea1i b\u1ecb h\u1ea1n ch\u1ebf trong m\u1ed9t khu v\u1ef1c nh\u1ecf h\u1eb9p ch\u1ec9 b\u1eb1ng m\u1ed9t t\u1ef7 l\u1ec7 r\u1ea5t b\u00e9 so v\u1edbi di\u1ec7n t\u00edch \u0111\u00f3 \u2013 kh\u00f4ng \u0111\u1ee7 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 th\u00e2n c\u00e2y n\u1eb7ng nhi\u1ec1u t\u1ea5n. Nh\u01b0ng, nh\u1eefng c\u00e2y kh\u00f4ng may n\u00e0y th\u1eadm ch\u00ed c\u00f2n ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng nhi\u1ec1u th\u1ee9 kh\u00e1c n\u1eefa. Vi kh\u00ed h\u1eadu \u0111\u00f4 th\u1ecb b\u1ecb \u1ea3nh h\u01b0\u1edfng n\u1eb7ng n\u1ec1 b\u1edfi nh\u1ef1a \u0111\u01b0\u1eddng v\u00e0 b\u00ea t\u00f4ng t\u1ecfa nhi\u1ec7t. Trong khi c\u00e1c khu r\u1eebng t\u1ef1 l\u00e0m m\u00e1t m\u00ecnh trong nh\u1eefng \u0111\u00eam h\u00e8 oi \u1ea3, \u0111\u01b0\u1eddng ph\u1ed1 v\u00e0 c\u00e1c t\u00f2a nh\u00e0 l\u1ea1i ph\u00e1t ra nhi\u1ec7t m\u00e0 ch\u00fang \u0111\u00e3 h\u1ea5p thu v\u00e0o ban ng\u00e0y, khi\u1ebfn nhi\u1ec7t \u0111\u1ed9 c\u1ee9 t\u0103ng l\u00ean. Nhi\u1ec7t t\u1ecfa ra khi\u1ebfn kh\u00f4ng kh\u00ed c\u1ef1c k\u1ef3 kh\u00f4. Kh\u00f4ng ch\u1ec9 v\u1eady, n\u01a1i \u0111\u00e2y c\u00f2n tr\u00e0n \u0111\u1ea7y kh\u00ed th\u1ea3i. Nhi\u1ec1u ng\u01b0\u1eddi b\u1ea1n v\u1ed1n ch\u0103m s\u00f3c cho s\u1ee9c kh\u1ecfe c\u1ee7a c\u00e2y trong r\u1eebng (ch\u1eb3ng h\u1ea1n c\u00e1c vi sinh v\u1eadt t\u1ea1o \u0111\u1ea5t m\u00f9n) \u0111\u1ec1u v\u1eafng m\u1eb7t. N\u1ea5m r\u1ec5 c\u1ed9ng sinh gi\u00fap thu th\u1eadp n\u01b0\u1edbc v\u00e0 th\u1ee9c \u0103n c\u0169ng ch\u1ec9 xu\u1ea5t hi\u1ec7n v\u1edbi s\u1ed1 l\u01b0\u1ee3ng \u00edt \u1ecfi. Do \u0111\u00f3, nh\u1eefng c\u00e2y xanh n\u01a1i \u0111\u00f4 th\u1ecb ph\u1ea3i t\u1ef1 lo m\u1ed9t m\u00ecnh trong \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng kh\u1eafc nghi\u1ec7t nh\u1ea5t.","Nh\u01b0 th\u1ec3 th\u1ebf v\u1eabn ch\u01b0a \u0111\u1ee7, ch\u00fang c\u00f2n ph\u1ea3i x\u1eed l\u00fd v\u1edbi nh\u1eefng lo\u1ea1i ph\u00e2n b\u00f3n b\u1ed5 sung m\u00e0 ch\u00fang ch\u1eb3ng y\u00eau c\u1ea7u. Tr\u01b0\u1edbc h\u1ebft l\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c ch\u00f3 \u201cc\u1ed1ng hi\u1ebfn\u201d \u2013 l\u0169 n\u00e0y c\u1ee9 nh\u1ea5c ch\u00e2n l\u00ean \u1edf m\u1ecdi th\u00e2n c\u00e2y c\u00f3 s\u1eb5n. N\u01b0\u1edbc ti\u1ec3u c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 \u0111\u1ed1t ch\u00e1y v\u1ecf c\u00e2y v\u00e0 gi\u1ebft ch\u1ebft r\u1ec5 c\u00e2y. Mu\u1ed1i r\u1ea3i v\u00e0o m\u00f9a \u0111\u00f4ng c\u0169ng d\u1eabn \u0111\u1ebfn t\u1ed5n h\u1ea1i t\u01b0\u01a1ng tuwj\u273d. T\u00f9y thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng c\u1ee7a c\u00e1i l\u1ea1nh, mu\u1ed1i th\u1ec9nh tho\u1ea3ng \u0111\u01b0\u1ee3c r\u1ea3i xung quanh c\u00e2y v\u1edbi t\u1ef7 l\u1ec7 c\u1ee9 2,2 pound (997,903 gram) m\u1ed9t yard vu\u00f4ng (0,836 m3). B\u00ean c\u1ea1nh \u0111\u00f3, l\u00e1 kim tr\u00ean c\u00e1c c\u00e2y ng\u00e0nh th\u00f4ng \u2013 v\u1ed1n v\u1eabn d\u00ednh ch\u1eb7t tr\u00ean c\u00e0nh v\u00e0o m\u00f9a \u0111\u00f4ng, c\u00f2n ph\u1ea3i gi\u1ea3i quy\u1ebft s\u1ed1 mu\u1ed1i b\u1ecb b\u00e1nh xe \u00f4 t\u00f4 ch\u1ea1y qua b\u1eafn l\u00ean. \u00cdt nh\u1ea5t m\u01b0\u1eddi ph\u1ea7n tr\u0103m l\u01b0\u1ee3ng mu\u1ed1i s\u1ebd bay l\u00ean kh\u00f4ng trung v\u00e0 r\u01a1i ng\u01b0\u1ee3c l\u00ean c\u00e2y \u2013 gi\u1eefa nh\u1eefng n\u01a1i \u0111\u00e1p xu\u1ed1ng kh\u00e1c \u2013 v\u00e0 l\u00e0m b\u1ecfng t\u00e1n. Nh\u1eefng v\u1ebft th\u01b0\u01a1ng \u0111au \u0111\u1edbn n\u00e0y xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng nh\u1eefng \u0111\u1ed1m nh\u1ecf m\u00e0u v\u00e0ng v\u00e0 n\u00e2u tr\u00ean nh\u1eefng chi\u1ebfc l\u00e1 kim. C\u00e1c v\u1ebft b\u1ecfng s\u1ebd l\u00e0m suy gi\u1ea3m kh\u1ea3 n\u0103ng quang h\u1ee3p c\u1ee7a c\u00e2y trong m\u00f9a h\u00e8 k\u1ebf ti\u1ebfp, do \u0111\u00f3 khi\u1ebfn c\u00e2y b\u1ecb y\u1ebfu \u0111i. Y\u1ebfu s\u1ee9c \u0111\u1ed3ng ngh\u0129a v\u1edbi s\u00e2u b\u1ec7nh xu\u1ea5t hi\u1ec7n. R\u1ec7p v\u1ea3y v\u00e0 r\u1ec7p v\u1eebng d\u1ec5 d\u00e0ng t\u1ea5n c\u00f4ng c\u00e2y h\u01a1n, v\u00ec nh\u1eefng c\u00e2y tr\u00ean ph\u1ed1 ch\u1ec9 c\u00f3 th\u1ec3 d\u00e0nh ra s\u1ed1 t\u00e0i nguy\u00ean h\u1ea1n ch\u1ebf cho vi\u1ec7c t\u1ef1 v\u1ec7. Nhi\u1ec7t \u0111\u1ed9 cao \u1edf \u0111\u00f4 th\u1ecb c\u0169ng l\u00e0 m\u1ed9t nh\u00e2n t\u1ed1 g\u00f3p ph\u1ea7n v\u00e0o \u0111i\u1ec1u n\u00e0y. M\u00f9a h\u00e8 n\u00f3ng b\u1ee9c v\u00e0 m\u00f9a \u0111\u00f4ng \u1ea5m \u00e1p t\u1ea1o thu\u1eadn l\u1ee3i cho l\u0169 c\u00f4n tr\u00f9ng, gi\u00fap ch\u00fang s\u1ed1ng s\u00f3t v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn h\u01a1n. \u1ede Trung \u00c2u, c\u00f3 m\u1ed9t lo\u00e0i li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ea7u \u0111\u1ec1 tin t\u1ee9c v\u00ec lo\u00e0i n\u00e0y c\u0169ng l\u00e0 m\u1ed1i \u0111e d\u1ecda \u0111\u1ed1i v\u1edbi d\u00e2n c\u01b0 lo\u00e0i ng\u01b0\u1eddi: ng\u00e0i s\u1ed3i di\u1ec5u h\u00e0nh. Lo\u00e0i ng\u00e0i n\u00e0y c\u00f3 t\u00ean nh\u01b0 v\u1eady v\u00ec sau khi ch\u00e8 ch\u00e9n tr\u00ean t\u00e1n l\u00e1, s\u00e2u b\u01b0\u1edbm c\u1ee7a lo\u00e0i n\u00e0y s\u1ebd l\u0169 l\u01b0\u1ee3t n\u1ed1i \u0111u\u00f4i nhau b\u00f2 xu\u1ed1ng th\u00e2n c\u00e2y th\u00e0nh nh\u1eefng h\u00e0ng d\u00e0i. Ch\u00fang t\u1ef1 v\u1ec7 tr\u01b0\u1edbc nh\u1eefng k\u1ebb s\u0103n m\u1ed3i b\u1eb1ng nh\u1eefng m\u00e0ng t\u01a1 d\u00e0y \u2013 n\u01a1i ch\u00fang s\u1ebd r\u00fac v\u00e0o c\u1ed1 th\u1ee7 trong l\u00fac l\u1edbn l\u00ean. Ng\u01b0\u1eddi ta s\u1ee3 nh\u1eefng con c\u00f4n tr\u00f9ng t\u00ed hon n\u00e0y v\u00ec ch\u00fang \u0111\u01b0\u1ee3c bao ph\u1ee7 trong l\u1edbp l\u00f4ng nh\u1ecf m\u1ecbn g\u00e2y ng\u1ee9a \u2013 th\u1ee9 s\u1ebd g\u00e3y ra khi b\u1ea1n ch\u1ea1m tr\u00fang v\u00e0 chui v\u00e0o d\u01b0\u1edbi da b\u1ea1n. \u1ede \u0111\u1ea5y, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 gai ng\u1ee9a c\u1ee7a c\u00e2y t\u1ea7m ma, l\u00f4ng s\u00e2u s\u1ebd ph\u00e1t t\u00e1n c\u00e1c ch\u1ea5t g\u00e2y ng\u1ee9a ng\u00e1y, ph\u1ed3ng r\u1ed9p v\u00e0 th\u1eadm ch\u00ed c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c ph\u1ea3n \u1ee9ng d\u1ecb \u1ee9ng c\u1ea5p t\u00ednh. L\u00f4ng ng\u1ee9a tr\u00ean nh\u1eefng mi\u1ebfng da s\u00e2u l\u1ed9t ra v\u1eabn treo l\u1ee7ng l\u1eb3ng tr\u00ean t\u1ed5 ch\u00fang v\u00e0 \u0111\u1ebfn m\u01b0\u1eddi n\u0103m sau v\u1eabn c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n \u1ede","th\u01b0\u01a1ng. \u1ede khu v\u1ef1c \u0111\u00f4 th\u1ecb, lo\u00e0i c\u00f4n tr\u00f9ng n\u00e0y xu\u1ea5t hi\u1ec7n s\u1ebd l\u00e0m h\u1ecfng nguy\u00ean c\u1ea3 m\u00f9a h\u00e8, nh\u01b0ng r\u1ed1t c\u1ee5c th\u00ec ch\u00fang l\u1ea1i kh\u00f4ng ph\u1ea3i l\u00e0 b\u00ean c\u00f3 l\u1ed7i. Ng\u00e0i s\u1ed3i t\u01b0\u01a1ng \u0111\u1ed1i hi\u1ebfm trong thi\u00ean nhi\u00ean. Ch\u1ec9 m\u1edbi v\u00e0i th\u1eadp k\u1ef7 tr\u01b0\u1edbc, ch\u00fang c\u00f2n n\u1eb1m trong danh s\u00e1ch c\u00e1c lo\u00e0i b\u1ecb \u0111e d\u1ecda nghi\u00eam tr\u1ecdng, c\u00f2n gi\u1edd th\u00ec m\u1ecdi ng\u01b0\u1eddi \u1edf kh\u1eafp n\u01a1i \u0111\u1ec1u mu\u1ed1n di\u1ec7t s\u1ea1ch ch\u00fang \u0111i cho khu\u1ea5t m\u1eaft. S\u1ef1 b\u00f9ng n\u1ed5 s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i ng\u00e0i n\u00e0y \u0111\u01b0\u1ee3c cho l\u00e0 x\u1ea3y ra trong h\u01a1n hai tr\u0103m n\u0103m. C\u01a1 quan Li\u00ean bang \u0110\u1ee9c v\u1ec1 B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean kh\u00f4ng cho r\u1eb1ng vi\u1ec7c ng\u00e0i tr\u00e0n v\u00e0o qu\u1ea5y ph\u00e1 l\u00e0 do s\u1ef1 thay \u0111\u1ed5i kh\u00ed h\u1eadu v\u00e0 nhi\u1ec7t \u0111\u1ed9 gia t\u0103ng, m\u00e0 l\u00e0 do s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a ngu\u1ed3n th\u1ee9c \u0103n h\u1ea5p d\u1eabn \u0111\u1ed1i v\u1edbi lo\u00e0i ng\u00e0i. Ch\u00fang y\u00eau th\u00edch nh\u1eefng t\u00e1n l\u00e1 \u1ea5m \u00e1p d\u01b0\u1edbi \u00e1nh n\u1eafng chan h\u00f2a. \u1ede gi\u1eefa r\u1eebng r\u1eadm, nh\u1eefng ch\u1ed7 nh\u01b0 th\u1ebf r\u1ea5t kh\u00f3 ki\u1ebfm. Trong r\u1eebng, s\u1ed1 s\u1ed3i \u00edt \u1ecfi m\u1ecdc l\u1eabn l\u1ed9n v\u1edbi nh\u1eefng c\u00e2y d\u1ebb gai, v\u00e0 ch\u1ec9 ng\u1ecdn c\u00e2y c\u1ee7a ch\u00fang m\u1edbi v\u01b0\u01a1n \u0111\u01b0\u1ee3c \u0111\u1ebfn \u00e1nh s\u00e1ng. Tuy nhi\u00ean, trong th\u00e0nh ph\u1ed1, s\u1ed3i \u0111\u1ee9ng s\u1eebng s\u1eefng gi\u1eefa tr\u1eddi \u2013 n\u01a1i \u0111\u1ea5y, ch\u00fang \u0111\u01b0\u1ee3c th\u00e1i d\u01b0\u01a1ng s\u01b0\u1edfi \u1ea5m su\u1ed1t c\u1ea3 ng\u00e0y. L\u0169 s\u00e2u b\u01b0\u1edbm r\u1ea5t th\u00edch \u0111i\u1ec1u n\u00e0y. V\u00e0 v\u00ec c\u1ea3 \u201ckhu r\u1eebng\u201d n\u01a1i \u0111\u00f4 th\u1ecb cung c\u1ea5p \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng qu\u00e1 ho\u00e0n h\u1ea3o, ch\u1eb3ng h\u1ec1 ng\u1ea1c nhi\u00ean khi s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i n\u00e0y b\u00f9ng n\u1ed5 \u2013 l\u1eddi nh\u1eafc nh\u1edf l\u1ea1nh l\u00f9ng r\u1eb1ng s\u1ed3i v\u00e0 c\u00e1c lo\u00e0i c\u00e2y kh\u00e1c m\u1ecdc d\u1ecdc \u0111\u01b0\u1eddng ph\u1ed1 v\u00e0 gi\u1eefa c\u00e1c ng\u00f4i nh\u00e0 s\u1ebd ph\u1ea3i chi\u1ebfn \u0111\u1ea5u cho s\u1ef1 s\u1ed1ng c\u1ee7a ch\u00fang. Cu\u1ed1i c\u00f9ng th\u00ec n\u1ed7i c\u0103ng th\u1eb3ng m\u00e0 c\u00e2y ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng nhi\u1ec1u \u0111\u1ebfn m\u1ee9c h\u1ea7u h\u1ebft ch\u00fang \u0111\u1ec1u ch\u1ebft non. M\u1eb7c d\u00f9 c\u00e2y c\u00f3 th\u1ec3 l\u00e0m b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec ch\u00fang mu\u1ed1n khi c\u00f2n tr\u1ebb, s\u1ef1 t\u1ef1 do n\u00e0y kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho nh\u1eefng b\u1ea5t l\u1ee3i m\u00e0 ch\u00fang ph\u1ea3i \u0111\u1ed1i m\u1eb7t sau \u0111\u00f3 trong cu\u1ed9c \u0111\u1eddi. Nh\u01b0ng c\u00f3 m\u1ed9t \u0111i\u1ec1u an \u1ee7i: Do c\u00e1c con ph\u1ed1 v\u00e0 \u0111\u01b0\u1eddng \u0111i b\u1ed9 th\u01b0\u1eddng tr\u1ed3ng c\u00e1c h\u00e0ng c\u00e2y c\u00f9ng lo\u00e0i, n\u00ean \u00edt ra ch\u00fang c\u00f3 th\u1ec3 giao ti\u1ebfp v\u1edbi nh\u1eefng th\u00e0nh vi\u00ean \u0111\u1ed3ng lo\u1ea1i kh\u00e1c. Ti\u00eau huy\u1ec1n \u2013 c\u00f3 th\u1ec3 nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c nh\u1edd v\u00e0o v\u1ecf c\u00e2y thu h\u00fat, th\u1ee9 s\u1ebd tr\u00f3c th\u00e0nh t\u1eebng m\u1ea3ng \u0111\u1ee7 m\u00e0u s\u1eafc \u2013 l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho vi\u1ec7c tr\u1ed3ng c\u00e2y theo \u201ck\u1ef7 lu\u1eadt th\u00e9p\u201d th\u1ebf n\u00e0y. B\u1ea5t k\u1ec3 \u0111i\u1ec1u g\u00ec l\u0169 tr\u1ebb \u0111\u01b0\u1eddng ph\u1ed1 n\u00e0y n\u00f3i v\u1edbi nhau th\u00f4ng qua nh\u1eefng \u201cb\u1ee9c th\u01b0 m\u00f9i h\u01b0\u01a1ng\u201d \u2013 v\u00e0 d\u00f9 cho gi\u1ecdng \u0111i\u1ec7u c\u1ee7a nh\u1eefng th\u00f4ng \u0111i\u1ec7p n\u00e0y c\u00f3 th\u00f4 b\u1ea1o nh\u01b0 cu\u1ed9c \u0111\u1eddi","c\u1ee7a ch\u00fang hay kh\u00f4ng \u2013 th\u00ec nh\u1eefng \u201cb\u0103ng nh\u00f3m\\\" \u0111\u01b0\u1eddng ph\u1ed1 n\u00e0y \u0111\u1ec1u \u0111ang gi\u1eef nghi\u00eam ng\u1eb7t nh\u1eefng th\u00f4ng tin \u1ea5y cho ri\u00eang ch\u00fang.","\u20142\u26058\u2014 KI\u1ec6T S\u1ee8C Nh\u1eefng \u201c\u0111\u1ee9a tr\u1ebb \u0111\u01b0\u1eddng ph\u1ed1\u201d ch\u1eb3ng \u0111\u01b0\u1ee3c cho kh\u00f4ng kh\u00ed s\u1ed1ng tho\u1ea3i m\u00e1i nh\u01b0 \u1edf trong r\u1eebng. V\u00e0 v\u00ec b\u1ecb k\u1eb9t c\u1ee9ng \u1edf n\u01a1i m\u00e0 ch\u00fang b\u1ecb tr\u1ed3ng xu\u1ed1ng, ch\u00fang kh\u00f4ng c\u00f2n l\u1ef1a ch\u1ecdn n\u00e0o kh\u00e1c. Tuy nhi\u00ean, m\u1ed9t v\u00e0i lo\u00e0i c\u00e2y ch\u1eb3ng h\u1ec1 quan t\u00e2m \u0111\u1ebfn nh\u1eefng ti\u1ec7n nghi v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c x\u00e3 h\u1ed9i do r\u1eebng r\u1eadm \u0111em \u0111\u1ebfn, m\u00e0 l\u1ea1i th\u00edch t\u1ef1 m\u00ecnh v\u01b0\u1ee3t l\u00ean. Nh\u1eefng lo\u00e0i n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y ti\u00ean phong (n\u00f3i th\u1ebf nghe c\u00f3 v\u1ebb t\u1ed1t h\u01a1n), ch\u00fang th\u00edch l\u1edbn l\u00ean \u1edf n\u01a1i c\u00e0ng xa m\u1eb9 ch\u00fang c\u00e0ng t\u1ed1t. Do \u0111\u00f3, h\u1ea1t c\u1ee7a nh\u1eefng lo\u00e0i n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng bay nh\u1eefng qu\u00e3ng \u0111\u01b0\u1eddng d\u00e0i. H\u1ea1t ch\u00fang r\u1ea5t b\u00e9 nh\u1ecf, \u0111\u01b0\u1ee3c \u0111\u1ed9n b\u00f4ng hay \u0111\u01b0\u1ee3c trang b\u1ecb nh\u1eefng \u0111\u00f4i c\u00e1nh t\u00ed hon \u0111\u1ec3 nh\u1eefng c\u01a1n d\u00f4ng t\u1ed1 m\u1ea1nh m\u1ebd c\u00f3 th\u1ec3 mang ch\u00fang \u0111i h\u00e0ng d\u1eb7m. M\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang l\u00e0 \u0111\u00e1p xu\u1ed1ng b\u00ean ngo\u00e0i khu r\u1eebng \u2013 n\u01a1i ch\u00fang c\u00f3 th\u1ec3 chi\u1ebfm l\u1ea5y nh\u1eefng khu v\u1ef1c m\u1edbi. Ch\u1ed7 m\u1edbi b\u1ecb t\u00e0n ph\u00e1 b\u1edfi \u0111\u1ea5t l\u1edf, hay n\u01a1i g\u1ea7n \u0111\u00e2y m\u1edbi c\u00f3 n\u00fai l\u1eeda phun tr\u00e0o ra m\u1ed9t l\u01b0\u1ee3ng kh\u00f3i b\u1ee5i kh\u1ed5ng l\u1ed3, nh\u1eefng khu v\u1ef1c b\u1ecb ch\u00e1y r\u1eebng \u0111\u1ed1t tr\u1ee5i \u2013 t\u1ea5t c\u1ea3 \u0111\u1ec1u r\u1ea5t c\u00f3 ti\u1ec1m n\u0103ng mi\u1ec5n l\u00e0 ch\u1eb3ng c\u00f2n c\u00e2y l\u1edbn n\u00e0o s\u00f3t l\u1ea1i \u1edf n\u01a1i \u1ea5y. \u0110i\u1ec1u n\u00e0y l\u00e0 c\u00f3 l\u00fd do: Nh\u1eefng lo\u00e0i ti\u00ean phong gh\u00e9t b\u00f3ng r\u00e2m. B\u00f3ng r\u00e2m l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh cao l\u00ean c\u1ee7a ch\u00fang, v\u00e0 c\u00e2y n\u00e0o l\u1edbn ch\u1eadm th\u00ec coi nh\u01b0 thua r\u1ed3i. Cu\u1ed9c ch\u1ea1y \u0111ua gi\u00e0nh n\u01a1i c\u00f3 \u00e1nh n\u1eafng n\u1ed5 ra gi\u1eefa c\u00e1c anh-ch\u00e0ng-c\u1ea7n l\u00e0-c\u00f3-m\u1eb7t. Nh\u1eefng k\u1ebb c\u1ea7n c\u00f9 nhi\u1ec7t t\u00ecnh n\u00e0y g\u1ed3m nhi\u1ec1u lo\u00e0i d\u01b0\u01a1ng kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u01b0\u01a1ng l\u00e1 rung, b\u1ea1ch d\u01b0\u01a1ng, v\u00e0 li\u1ec5u t\u01a1. Ng\u01b0\u1ee3c v\u1edbi d\u1ebb gai con v\u00e0 s\u1ed3i con \u2013 nh\u1eefng c\u00e2y c\u00f3 m\u1ee9c sinh tr\u01b0\u1edfng h\u00e0ng n\u0103m ch\u1ec9 c\u00f3 th\u1ec3 t\u00ednh b\u1eb1ng ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t inch, c\u00e1c c\u00e2y ti\u00ean phong th\u1ec9nh tho\u1ea3ng ph\u00e1t tri\u1ec3n cao \u0111\u1ebfn h\u01a1n 3","feet (0,9144 m) trong c\u00f9ng m\u1ed9t giai \u0111o\u1ea1n. Ch\u1ec9 trong v\u00f2ng m\u01b0\u1eddi n\u0103m, ch\u00fang c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i v\u00f9ng \u0111\u1ea5t t\u1eebng hoang t\u00e0n th\u00e0nh m\u1ed9t khu r\u1eebng non tr\u1ebb x\u00e0o x\u1ea1c trong gi\u00f3. V\u00e0 h\u1ea7u h\u1ebft nh\u1eefng k\u1ebb \u201ckh\u1edfi nghi\u1ec7p nhanh\u201d n\u00e0y sau \u0111\u00f3 s\u1ebd n\u1edf hoa \u0111\u1ec3 gi\u00fap h\u1ea1t gi\u1ed1ng c\u1ee7a ch\u00fang c\u0169ng c\u00f3 m\u1ed9t kh\u1edfi \u0111\u1ea7u v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c t\u00ecm ki\u1ebfm v\u00e0 chinh ph\u1ee5c nh\u1eefng v\u01b0\u01a1ng qu\u1ed1c m\u1edbi, c\u0169ng nh\u01b0 c\u01a1 h\u1ed9i chi\u1ebfm l\u1ea5y nh\u1eefng ch\u1ed7 \u0111\u1ea5t l\u1ed9 thi\u00ean cu\u1ed1i c\u00f9ng c\u00f2n s\u00f3t l\u1ea1i xung quanh. Tuy nhi\u00ean, n\u01a1i tr\u1ed1ng tr\u1ea3i l\u1ea1i thu h\u00fat th\u00fa \u0103n th\u1ef1c v\u1eadt, v\u00ec kh\u00f4ng ch\u1ec9 c\u00e2y mu\u1ed1n th\u1eed v\u1eadn may c\u1ee7a m\u00ecnh \u1edf n\u01a1i \u1ea5y, m\u00e0 c\u1ecf v\u00e0 hoa d\u1ea1i c\u0169ng mu\u1ed1n l\u00e0m nh\u01b0 v\u1eady \u2013 nh\u1eefng lo\u00e0i n\u00e0y v\u1ed1n kh\u00f4ng s\u1ed1ng n\u1ed5i \u1edf t\u1ea7ng s\u00e1t m\u1eb7t r\u1eebng. H\u01b0\u01a1u \u2013 ho\u1eb7c, h\u1ed3i tr\u01b0\u1edbc l\u00e0 ng\u1ef1a hoang, b\u00f2 r\u1eebng ch\u00e2u \u00c2u v\u00e0 b\u00f2 r\u1eebng bison \u2013 b\u1ecb nh\u1eefng lo\u00e0i th\u1ef1c v\u1eadt n\u00e0y h\u1ea5p d\u1eabn \u0111\u1ebfn. C\u1ecf th\u00edch nghi v\u1edbi vi\u1ec7c b\u1ecb g\u1eb7m li\u00ean t\u1ee5c v\u00e0 th\u1edf ph\u00e0o nh\u1eb9 nh\u00f5m khi th\u1ea5y nh\u1eefng c\u00e2y non \u2013 th\u1ee9 \u0111e d\u1ecda s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a ch\u00fang, b\u1ecb \u0103n s\u1ea1ch. Nhi\u1ec1u c\u00e2y b\u1ee5i \u2013 nh\u1eefng lo\u00e0i y\u00eau tha thi\u1ebft vi\u1ec7c m\u1ecdc cao h\u01a1n c\u1ecf, ph\u00e1t tri\u1ec3n c\u00e1c gai nh\u1ecdn d\u1eef t\u1ee3n \u0111\u1ec3 t\u1ef1 b\u1ea3o v\u1ec7 b\u1ea3n th\u00e2n kh\u1ecfi nh\u1eefng con qu\u00e1i v\u1eadt ph\u00e0m \u0103n. M\u1eadn gai hung \u00e1c \u0111\u1ebfn n\u1ed7i nh\u1eefng gai nh\u1ecdn ch\u1ec9a th\u1eb3ng c\u1ee7a ch\u00fang v\u1eabn d\u00ednh ch\u1eb7t tr\u00ean c\u00e2y \u0111\u00e3 ch\u1ebft h\u00e0ng n\u0103m tr\u1eddi, h\u00f2ng xuy\u00ean th\u1ee7ng \u1ee7ng cao su v\u00e0 th\u1eadm ch\u00ed l\u00e0 c\u1ea3 l\u1ed1p xe h\u01a1i, ch\u1ee9 \u0111\u1eebng n\u00f3i \u0111\u1ebfn da hay m\u00f3ng c\u1ee7a l\u0169 \u0111\u1ed9ng v\u1eadt. Nh\u1eefng c\u00e2y ti\u00ean phong c\u0169ng t\u00ecm nhi\u1ec1u c\u00e1ch kh\u00e1c nhau \u0111\u1ec3 t\u1ef1 v\u1ec7. Ch\u00fang ph\u00e1t tri\u1ec3n nhanh, v\u00ec th\u1ebf th\u00e2n c\u1ee7a ch\u00fang c\u0169ng nhanh ch\u00f3ng to m\u1eadp ra, v\u00e0 ch\u00fang kho\u00e1c l\u00ean m\u00ecnh l\u1edbp v\u1ecf c\u00e2y x\u00f9 x\u00ec d\u00e0y c\u1ed9m. B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y b\u1eb1ng ch\u1ee9ng cho vi\u1ec7c ph\u00e1t tri\u1ec3n mau ch\u00f3ng n\u00e0y tr\u00ean b\u1ea1ch d\u01b0\u01a1ng: Nh\u1eefng v\u1ebft n\u1ee9t \u0111en xu\u1ea5t hi\u1ec7n tr\u00ean l\u1edbp v\u1ecf ngo\u00e0i tr\u1eafng m\u1ecbn c\u1ee7a ch\u00fang. Nh\u1eefng k\u1ebb g\u1eb7m c\u1ecf kh\u00f4ng nh\u1eefng s\u1ebd g\u00e3y r\u0103ng v\u00ec l\u1edbp v\u1ecf c\u00e2y dai c\u1ee9ng n\u00e0y, m\u00e0 ch\u00fang c\u00f2n b\u1ecb v\u1ecb c\u1ee7a nh\u1eefng th\u1edb g\u1ed7 b\u00e3o h\u00f2a d\u1ea7u l\u00e0m cho gh\u00ea t\u1edfm. Nh\u00e2n ti\u1ec7n, lo\u1ea1i d\u1ea7u n\u00e0y l\u00e0 nguy\u00ean nh\u00e2n v\u00ec sao nh\u1eefng v\u1ecf b\u1ea1ch d\u01b0\u01a1ng c\u00f2n xanh v\u1eabn ch\u00e1y v\u00f4 c\u00f9ng t\u1ed1t v\u00e0 d\u00f9ng r\u1ea5t tuy\u1ec7t khi nh\u00f3m l\u1eeda tr\u1ea1i. (N\u1ebfu b\u1ea1n s\u1eafp th\u1eed nh\u00f3m l\u1eeda b\u1eb1ng b\u1ea1ch d\u01b0\u01a1ng, th\u00ec ch\u1ec9 n\u00ean l\u1ed9t m\u1ed7i ph\u1ea7n v\u1ecf c\u00e2y ngo\u00e0i c\u00f9ng th\u00f4i, nh\u01b0 th\u1ebf s\u1ebd kh\u00f4ng h\u1ea1i \u0111\u1ebfn c\u00e2y).","V\u1ecf b\u1ea1ch d\u01b0\u01a1ng c\u00f2n gi\u1ea5u m\u1ed9t \u0111i\u1ec1u ng\u1ea1c nhi\u00ean kh\u00e1c n\u1eefa. Ch\u00fang c\u00f3 m\u00e0u tr\u1eafng v\u00ec ch\u1ee9a belutin ho\u1ea1t t\u00ednh \u2013 th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a v\u1ecf c\u00e2y. M\u00e0u tr\u1eafng ph\u1ea3n chi\u1ebfu \u00e1nh m\u1eb7t tr\u1eddi v\u00e0 b\u1ea3o v\u1ec7 th\u00e2n c\u00e2y kh\u1ecfi b\u1ecb b\u1ecfng n\u1eafng. N\u00f3 c\u0169ng b\u1ea3o v\u1ec7 th\u00e2n kh\u00f4ng b\u1ecb t\u0103ng nhi\u1ec7t d\u01b0\u1edbi c\u00e1c tia n\u1eafng \u0111un n\u00f3ng c\u1ee7a m\u1eb7t tr\u1eddi m\u00f9a \u0111\u00f4ng \u2013 th\u1ee9 c\u00f3 th\u1ec3 khi\u1ebfn nh\u1eefng c\u00e2y kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 nh\u00fa ra ch\u1ed3i non. Do b\u1ea1ch d\u01b0\u01a1ng l\u00e0 lo\u00e0i c\u00e2y ti\u00ean phong th\u01b0\u1eddng m\u1ecdc m\u1ed9t m\u00ecnh \u1edf nh\u1eefng kh\u00f4ng gian tho\u00e1ng \u0111\u00e3ng r\u1ed9ng m\u1edf, kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 c\u00e2y h\u00e0ng x\u00f3m n\u00e0o che b\u00f3ng, n\u00ean ch\u00fang c\u00f3 \u0111\u1eb7c t\u00ednh nh\u01b0 tr\u00ean l\u00e0 h\u1ee3p l\u00fd. Betulin c\u0169ng c\u00f3 t\u00ednh kh\u00e1ng vi r\u00fat v\u00e0 di\u1ec7t khu\u1ea9n, n\u00ean ch\u00fang l\u00e0 th\u00e0nh ph\u1ea7n trong d\u01b0\u1ee3c ph\u1ea9m v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m ch\u0103m s\u00f3c da. \u0110i\u1ec1u th\u1ef1c s\u1ef1 ng\u1ea1c nhi\u00ean l\u00e0 c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn betulin trong v\u1ecf b\u1ea1ch d\u01b0\u01a1ng. M\u1ed9t c\u00e2y xanh t\u1ea1o ra v\u1ecf c\u00e2y ch\u1ee7 y\u1ebfu t\u1eeb nh\u1eefng h\u1ee3p ch\u1ea5t t\u1ef1 v\u1ec7 ngh\u0129a l\u00e0 c\u00e2y n\u00e0y \u0111ang li\u00ean t\u1ee5c trong t\u00ecnh tr\u1ea1ng \u0111\u1ec1 gi\u00e1c. C\u00e2y \u1ea5y s\u1ebd kh\u00f4ng c\u00f3 s\u1ef1 c\u00e2n b\u1eb1ng \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh c\u1ea9n th\u1eadn gi\u1eefa cao c\u1ea3nh c\u00e1c h\u1ee3p ch\u1ea5t sinh tr\u01b0\u1edfng v\u00e0 ch\u1eefa tr\u1ecb. Thay v\u00e0o \u0111\u00f3, l\u1edbp gi\u00e1p t\u1ef1 v\u1ec7 \u0111\u01b0\u1ee3c t\u1ea1o ra v\u1edbi t\u1ed1c \u0111\u1ed9 qu\u00e1 nhanh \u1edf kh\u1eafp m\u1ecdi n\u01a1i. T\u1ea1i sao m\u1ed7i lo\u00e0i c\u00e2y \u0111\u1ec1u kh\u00f4ng l\u00e0m th\u1ebf? Ch\u1eb3ng ph\u1ea3i r\u1ea5t h\u1ee3p l\u00fd n\u1ebfu chu\u1ea9n b\u1ecb k\u1ef9 l\u01b0\u1ee1ng tr\u01b0\u1edbc s\u1ef1 t\u1ea5n c\u00f4ng, h\u00f2ng khi\u1ebfn nh\u1eefng k\u1ebb g\u00e2y h\u1ea5n ti\u1ec1m t\u00e0ng ph\u1ea3i t\u1eaft th\u1edf ngay v\u00e0o gi\u00e2y ph\u00fat ch\u00fang c\u1eafn mi\u1ebfng \u0111\u1ea7u ti\u00ean sao? Nh\u1eefng lo\u00e0i s\u1ed1ng theo nh\u00f3m x\u00e3 h\u1ed9i s\u1ebd kh\u00f4ng t\u00e1n th\u00e0nh l\u1ef1a ch\u1ecdn n\u00e0y v\u00ec m\u1ed7i c\u00e1 th\u1ec3 \u0111\u1ec1u thu\u1ed9c v\u1ec1 m\u1ed9t c\u1ed9ng \u0111\u1ed3ng, v\u00e0 c\u1ed9ng \u0111\u1ed3ng s\u1ebd ch\u0103m s\u00f3c c\u00e2y nh\u1eefng khi ch\u00fang c\u1ea7n, c\u1ea3nh b\u00e1o c\u00e2y khi nguy hi\u1ec3m s\u1eafp x\u1ea3y \u0111\u1ebfn, v\u00e0 cho c\u00e2y \u0103n khi c\u00e2y b\u1ecb b\u1ec7nh ho\u1eb7c g\u1eb7p n\u1ea1n. Gi\u1ea3m b\u1edbt vi\u1ec7c t\u1ef1 v\u1ec7 s\u1ebd gi\u00fap ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, nh\u1edd v\u1eady c\u00e2y sau \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u1ea7u t\u01b0 s\u1ed1 n\u0103ng l\u01b0\u1ee3ng \u1ea5y v\u00e0o vi\u1ec7c t\u1ea1o ra g\u1ed7, l\u00e1 v\u00e0 qu\u1ea3. Nh\u01b0ng t\u00ecnh hu\u1ed1ng c\u1ee7a b\u1ea1ch d\u01b0\u01a1ng l\u1ea1i kh\u00f4ng nh\u01b0 th\u1ebf, v\u00ec ch\u00fang ph\u1ea3i ho\u00e0n to\u00e0n t\u1ef1 d\u1ef1a v\u00e0o b\u1ea3n th\u00e2n n\u1ebfu mu\u1ed1n s\u1ed1ng s\u00f3t. Nh\u01b0ng ch\u00fang c\u0169ng ph\u00e1t tri\u1ec3n g\u1ed7 \u2013 th\u1ef1c s\u1ef1 ch\u00fang l\u00e0m vi\u1ec7c n\u00e0y nhanh h\u01a1n r\u1ea5t nhi\u1ec1u \u2013 v\u00e0 ch\u00fang c\u0169ng mu\u1ed1n, c\u0169ng ti\u1ebfn h\u00e0nh vi\u1ec7c sinh s\u1ea3n. V\u1eady t\u1ea5t c\u1ea3 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang \u0111\u1ebfn t\u1eeb \u0111\u00e2u? Li\u1ec7u lo\u00e0i n\u00e0y c\u00f3 th\u1ec3 b\u1eb1ng c\u00e1ch n\u00e0o \u0111\u00f3 quang h\u1ee3p hi\u1ec7u qu\u1ea3 h\u01a1n c\u00e1c lo\u00e0i kh\u00e1c? Kh\u00f4ng. H\u00f3a ra b\u00ed m\u1eadt n\u1eb1m \u1edf vi\u1ec7c c\u00e2y \u0111\u00f2i h\u1ecfi qu\u00e1 m\u1ee9c \u0111\u1ed1i v\u1edbi ngu\u1ed3n t\u00e0i nguy\u00ean c\u1ee7a ch\u00fang. B\u1ea1ch d\u01b0\u01a1ng s\u1ed1ng \u0111\u1eddi h\u1ed1i h\u1ea3, vung tay qu\u00e1 tr\u00e1n, v\u00e0 cu\u1ed1i c\u00f9ng","ch\u00fang ki\u1ec7t s\u1ee9c. Nh\u01b0ng tr\u01b0\u1edbc khi ch\u00fang ta ch\u00fa \u00fd \u0111\u1ebfn k\u1ebft qu\u1ea3 c\u1ee7a h\u00e0nh vi n\u00e0y, h\u00e3y cho ph\u00e9p t\u00f4i \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u cho b\u1ea1n m\u1ed9t t\u00e2m h\u1ed3n hay lay \u0111\u1ed9ng kh\u00e1c: d\u01b0\u01a1ng l\u00e1 rung. D\u01b0\u01a1ng l\u00e1 rung c\u00f3 t\u00ean n\u00e0y v\u00ec l\u00e1 c\u1ee7a ch\u00fang s\u1ebd ph\u1ea3n \u1ee9ng v\u1edbi th\u1eadm ch\u00ed l\u00e0n gi\u00f3 nh\u1eb9 nh\u1ea5t. M\u1eb7c d\u00f9 ch\u00fang ta c\u00f3 c\u00e2u t\u1ee5c ng\u1eef li\u00ean h\u1ec7 \u0111\u1eb7c t\u00ednh n\u00e0y v\u1edbi s\u1ef1 s\u1ee3 h\u00e3i (\u201crun nh\u01b0 chi\u1ebfc l\u00e1\u201d), nh\u01b0ng d\u01b0\u01a1ng l\u00e1 rung kh\u00f4ng run r\u1ea9y v\u00ec ho\u1ea3ng s\u1ee3. L\u00e1 c\u1ee7a ch\u00fang treo tr\u00ean nh\u1eefng chi\u1ebfc cu\u1ed1ng m\u1ec1m d\u1ebbo v\u00e0 s\u1ebd \u0111u \u0111\u01b0a trong gi\u00f3 nh\u1eb9, \u0111\u1ea7u ti\u00ean \u0111\u1ec3 l\u1ed9 m\u1eb7t l\u00e1 tr\u01b0\u1edbc r\u1ed3i ti\u1ebfp \u0111\u00f3 l\u00e0 m\u1eb7t l\u00e1 sau ra \u00e1nh m\u1eb7t tr\u1eddi. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u1ea3 hai m\u1eb7t l\u00e1 \u0111\u1ec1u c\u00f3 th\u1ec3 quang h\u1ee3p. \u0110i\u1ec1u n\u00e0y ng\u01b0\u1ee3c v\u1edbi nh\u1eefng lo\u00e0i kh\u00e1c: M\u1eb7t l\u00e1 b\u00ean d\u01b0\u1edbi \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 th\u1edf. Do v\u1eady, d\u01b0\u01a1ng l\u00e1 rung c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n, v\u00e0 ch\u00fang th\u1eadm ch\u00ed c\u00f3 th\u1ec3 l\u1edbn nhanh h\u01a1n c\u1ea3 b\u1ea1ch d\u01b0\u01a1ng. Khi n\u00f3i \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 \u0111\u1ed9ng v\u1eadt g\u00e2y h\u1ea1i, d\u01b0\u01a1ng l\u00e1 rung theo \u0111u\u1ed5i chi\u1ebfn l\u01b0\u1ee3c ho\u00e0n to\u00e0n kh\u00e1c v\u1edbi b\u1ea1ch d\u01b0\u01a1ng: Ch\u00fang d\u1ef1a v\u00e0o s\u1ef1 ngoan c\u01b0\u1eddng v\u00e0 k\u00edch th\u01b0\u1edbc. Th\u1eadm ch\u00ed khi c\u00e2y b\u1ecb h\u01b0\u01a1u g\u1eb7m c\u1ee5t t\u1eeb n\u0103m n\u00e0y sang n\u0103m kh\u00e1c, ch\u00fang v\u1eabn c\u1ee9 ch\u1ea7m ch\u1eadm m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng r\u1ec5 c\u1ee7a m\u00ecnh. T\u1eeb b\u1ed9 r\u1ec5, ch\u00fang sau \u0111\u00f3 ph\u00e1t tri\u1ec3n h\u00e0ng tr\u0103m ch\u1ed3i ph\u1ee5, v\u00e0 khi n\u0103m th\u00e1ng qua \u0111i, c\u00e1c ch\u1ed3i ph\u1ee5 n\u00e0y s\u1ebd ph\u00e1t tri\u1ec3n th\u00e0nh nh\u1eefng th\u00e2n c\u00e2y c\u00f3 k\u00edch th\u01b0\u1edbc t\u1ed1t. Do v\u1eady, m\u1ed9t c\u00e2y c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng sang h\u00e0ng tr\u0103m yard vu\u00f4ng \u0111\u1ea5t kh\u00e1c \u2013 ho\u1eb7c, trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t, th\u1eadm ch\u00ed c\u00f2n nhi\u1ec1u h\u01a1n th\u1ebf. Trong R\u1eebng Qu\u1ed1c gia Fishlake, Utah, c\u00f3 m\u1ed9t c\u00e2y d\u01b0\u01a1ng l\u00e1 rung \u0111\u00e3 h\u00e0ng ng\u00e0n n\u0103m tu\u1ed5i bao ph\u1ee7 h\u01a1n 100 m\u1eabu Anh v\u00e0 m\u1ecdc h\u01a1n b\u1ed1n m\u01b0\u01a1i ng\u00e0n th\u00e2n c\u00e2y. Sinh v\u1eadt n\u00e0y, gi\u1edd tr\u00f4ng y nh\u01b0 m\u1ed9t khu r\u1eebng l\u1edbn, \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean l\u00e0 \u201cPando\u201d (t\u1eeb ch\u1eef Latin \u201cpandere\u201d, ngh\u0129a l\u00e0 \u201clan r\u1ed9ng\u201d). B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y th\u1ee9 t\u01b0\u01a1ng t\u1ef1 \u1edf c\u00e1c khu r\u1eebng v\u00e0 c\u00e1nh \u0111\u1ed3ng t\u1ea1i ch\u00e2u \u00c2u, m\u1eb7c d\u00f9 kh\u00f4ng \u1edf quy m\u00f4 h\u00f9ng v\u0129 nh\u01b0 th\u1ebf. M\u1ed9t khi b\u1ee5i c\u00e2y tr\u1edf n\u00ean \u0111\u1ee7 d\u00e0y \u0111\u1eb7c, th\u00ec m\u1ed9t v\u00e0i th\u00e2n c\u00e2y c\u00f3 th\u1ec3 m\u1ecdc th\u1eb3ng l\u00ean tr\u00ean m\u00e0 kh\u00f4ng b\u1ecb qu\u1ea5y r\u1ea7y, v\u00e0 ph\u00e1t tri\u1ec3n th\u00e0nh nh\u1eefng c\u00e2y to l\u1edbn trong \u00edt h\u01a1n hai m\u01b0\u01a1i n\u0103m. Hi\u1ec3n nhi\u00ean l\u00e0 vi\u1ec7c \u0111\u1ea5u tranh kh\u00f4ng ng\u1eebng v\u00e0 sinh tr\u01b0\u1edfng c\u1ea5p t\u1ed1c g\u00e2y ra m\u1ea5t m\u00e1t l\u1edbn cho ch\u00fang. Sau ba th\u1eadp k\u1ef7 \u0111\u1ea7u, c\u00e2y b\u1eaft \u0111\u1ea7u ki\u1ec7t s\u1ee9c. Nh\u1eefng c\u00e0nh tr\u00ean c\u00f9ng \u2013 th\u01b0\u1edbc \u0111o sinh l\u1ef1c c\u1ee7a","\u1ec7g g \u1ef1 nh\u1eefng lo\u00e0i c\u00e2y ti\u00ean phong, th\u01b0a d\u1ea7n. B\u1ea3n th\u00e2n vi\u1ec7c \u0111\u00f3 kh\u00f4ng qu\u00e1 m\u1ee9c \u0111\u00e1ng lo, nh\u01b0ng r\u1eafc r\u1ed1i l\u1ea1i t\u00edch t\u1ee5 d\u1ea7n b\u00ean d\u01b0\u1edbi d\u01b0\u01a1ng, b\u1ea1ch d\u01b0\u01a1ng v\u00e0 li\u1ec5u. V\u00ec ch\u00fang \u0111\u1ec3 qu\u00e1 nhi\u1ec1u \u00e1nh s\u00e1ng chi\u1ebfu qua t\u00e1n xu\u1ed1ng n\u1ec1n \u0111\u1ea5t, nh\u1eefng anh-ch\u00e0ng-m\u1edbi-ph\u1ea5t c\u00f3 th\u1ec3 gi\u00e0nh \u0111\u01b0\u1ee3c ch\u1ed7 \u0111\u1ee9ng ch\u1eafc ch\u1eafn. Nh\u1eefng anh ch\u00e0ng n\u00e0y c\u00f3 th\u1ec3 l\u00e0 nh\u1eefng lo\u00e0i ph\u00e1t tri\u1ec3n ch\u1eadm h\u01a1n nh\u01b0 phong, d\u1ebb gai, tr\u0103n, ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 l\u00e3nh sam b\u1ea1c \u2013 nh\u1eefng lo\u00e0i v\u1ed1n th\u00edch tr\u1ea3i qua th\u1eddi \u1ea5u th\u01a1 d\u01b0\u1edbi b\u00f3ng m\u00e1t. Nh\u1eefng lo\u00e0i ti\u00ean phong kh\u00f4ng c\u00f2n l\u1ef1a ch\u1ecdn n\u00e0o kh\u00e1c ngo\u1ea1i tr\u1eeb che n\u1eafng cho nh\u1eefng c\u00e2y n\u00e0y, v\u00e0 khi l\u00e0m v\u1eady th\u00ec ch\u00fang c\u0169ng \u0111ang t\u1ef1 k\u00fd t\u00ean v\u00e0o l\u1ec7nh t\u1eed h\u00ecnh ch\u00ednh ch\u00fang. B\u1eaft \u0111\u1ea7u m\u1ed9t cu\u1ed9c \u0111\u1ecd s\u1ee9c m\u00e0 ch\u00fang th\u1ec3 n\u00e0o c\u0169ng s\u1ebd thua. Nh\u1eefng c\u00e2y non m\u1ecdc xen kia d\u1ea7n cao l\u00ean, v\u00e0 sau v\u00e0i th\u1eadp k\u1ef7, ch\u00fang s\u1ebd b\u1eaft k\u1ecbp c\u00e2y \u0111ang che b\u00f3ng cho ch\u00fang. V\u00e0o l\u00fac n\u00e0y, \u00e2n nh\u00e2n c\u1ee7a ch\u00fang \u0111\u00e3 \u201cch\u00e1y\u201d s\u1ea1ch s\u1ee9c, ho\u00e0n to\u00e0n ki\u1ec7t qu\u1ec7, v\u00e0 \u0111\u00e3 ch\u1ea1m \u0111\u1ebfn m\u1ee9c sinh tr\u01b0\u1edfng cao nh\u1ea5t l\u00e0 80 feet (24,384 m). V\u1edbi \u201cD\u1ebb gai & Nh\u1eefng ng\u01b0\u1eddi b\u1ea1n\u201d, 80 feet ch\u1eb3ng l\u00e0 g\u00ec c\u1ea3. Ch\u00fang len l\u1ecfi xuy\u00ean qua t\u00e1n c\u1ee7a nh\u1eefng c\u00e2y ti\u00ean phong, vui s\u01b0\u1edbng l\u1edbn l\u00ean v\u00e0 v\u01b0\u01a1n cao qua nh\u1eefng c\u00e2y n\u00e0y. V\u1edbi t\u00e1n l\u00e1 r\u1eadm r\u1ea1p, ch\u00fang khai th\u00e1c \u00e1nh s\u00e1ng t\u1ed1t h\u01a1n r\u1ea5t nhi\u1ec1u, v\u00e0 gi\u1edd th\u00ec \u201cm\u1eb7t h\u00e0ng\u201d qu\u00fd gi\u00e1 \u1ea5y ch\u1eb3ng c\u00f2n \u0111\u1ee7 cho d\u01b0\u01a1ng v\u00e0 b\u1ea1ch d\u01b0\u01a1ng n\u1eefa \u2013 ch\u00fang \u0111\u00e3 b\u1ecb v\u01b0\u1ee3t m\u1eb7t r\u1ed3i. Nh\u1eefng c\u00e2y kh\u1ed1n kh\u1ed5 \u1ea5y s\u1ebd chi\u1ebfn \u0111\u1ea5u ch\u1ed1ng l\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng c\u00e2y b\u1ea1ch d\u01b0\u01a1ng \u2013 lo\u00e0i \u0111\u00e3 ph\u00e1t tri\u1ec3n chi\u1ebfn l\u01b0\u1ee3c ng\u0103n cu\u1ed9c \u0111\u1ea5u phi\u1ec1n h\u00e0 n\u00e0y kh\u00f4ng h\u1ea1i \u0111\u01b0\u1ee3c \u0111\u1ebfn ch\u00fang th\u00eam \u00edt nh\u1ea5t v\u00e0i n\u0103m n\u1eefa: Nh\u1eefng c\u00e0nh c\u00e2y d\u00e0i, m\u1ea3nh, r\u0169 xu\u1ed1ng nh\u01b0 nh\u1eefng chi\u1ebfc roi da, v\u00e0 nh\u1eefng c\u00e0nh n\u00e0y qu\u1ea5t v\u1ec1 m\u1ecdi ph\u00eda d\u00f9 ch\u1ec9 l\u00e0 c\u01a1n gi\u00f3 nh\u1eb9 nh\u1ea5t tho\u00e1ng qua. H\u00e0nh \u0111\u1ed9ng \u201cqu\u1ea5t roi\u201d n\u00e0y s\u1ebd l\u00e0m t\u1ed5n h\u1ea1i t\u00e1n c\u1ee7a nh\u1eefng c\u00e2y h\u00e0ng x\u00f3m kh\u00f4ng c\u00f9ng h\u1ecd v\u1edbi ch\u00fang, \u201ct\u00e1t\u201d r\u1edbt l\u00e1 c\u00f9ng ch\u1ed3i non v\u00e0, \u00edt nh\u1ea5t trong th\u1eddi gian ng\u1eafn, s\u1ebd h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a nh\u1eefng c\u00e2y \u1ea5y. M\u1eb7c d\u00f9 v\u1eady, nh\u1eefng k\u1ebb thu\u00ea tr\u1ecd tr\u01a1 tr\u00e1o kia cu\u1ed1i c\u00f9ng v\u1eabn l\u1ea5n \u00e1t \u0111\u01b0\u1ee3c d\u01b0\u01a1ng c\u00f9ng b\u1ea1ch d\u01b0\u01a1ng, v\u00e0 gi\u1edd th\u00ec m\u1ecdi th\u1ee9 s\u1ebd x\u1ea3y ra kh\u00e1 nhanh. Ch\u1ec9 sau v\u00e0i n\u0103m th\u00f4i, kho d\u1ef1 tr\u1eef cu\u1ed1i c\u00f9ng c\u1ee7a ch\u00fang c\u1ea1n s\u1ea1ch, nh\u1eefng lo\u00e0i ti\u00ean phong tr\u00ean ch\u1ebft \u0111i v\u00e0 h\u00f3a th\u00e0nh m\u00f9n \u0111\u1ea5t.","Nh\u01b0ng cu\u1ed9c \u0111\u1eddi c\u1ee7a ch\u00fang v\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i ng\u1eafn khi so v\u1edbi nh\u1eefng c\u00e2y r\u1eebng kh\u00e1c, cho d\u00f9 ch\u00fang kh\u00f4ng g\u1eb7p ph\u1ea3i cu\u1ed9c chi\u1ebfn kh\u00f3 nh\u1eb1n n\u00e0o. Khi vi\u1ec7c m\u1ecdc cao c\u1ee7a ch\u00fang ch\u1eadm d\u1ea7n, kh\u1ea3 n\u0103ng ph\u00f2ng v\u1ec7 n\u1ea5m c\u1ee7a ch\u00fang bi\u1ebfn m\u1ea5t. M\u1ed9t c\u00e0nh c\u00e2y g\u00e3y c\u0169ng \u0111\u1ee7 \u0111\u1ec3 t\u1ea1o l\u1ed1i v\u00e0o cho n\u1ea5m. V\u00ec g\u1ed7 c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nh\u1eefng t\u1ebf b\u00e0o l\u1edbn ph\u00e1t tri\u1ec3n trong v\u1ed9i v\u00e3, n\u00ean ch\u1ee9a r\u1ea5t nhi\u1ec1u kh\u00f4ng kh\u00ed, do v\u1eady nh\u1eefng s\u1ee3i n\u1ea5m ph\u00e1 ho\u1ea1i c\u00f3 th\u1ec3 lan r\u1ed9ng nhanh ch\u00f3ng. Th\u00e2n c\u00e2y s\u1ebd m\u1ee5c \u1edf m\u1ee9c \u0111\u1ed9 l\u1edbn, v\u00e0 v\u00ec nh\u1eefng lo\u00e0i ti\u00ean phong th\u01b0\u1eddng \u0111\u1ee9ng s\u1eebng s\u1eefng gi\u1eefa tr\u1eddi m\u1ed9t m\u00ecnh, ch\u1eb3ng bao l\u00e2u th\u00ec c\u01a1n b\u00e3o m\u00f9a thu k\u1ebf ti\u1ebfp c\u0169ng s\u1ebd qu\u1eadt ng\u00e3 c\u00e2y. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 bi k\u1ecbch \u0111\u1ed1i v\u1edbi b\u1ea3n th\u00e2n lo\u00e0i n\u00e0y. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c ph\u00e1t t\u00e1n nhanh ch\u00f3ng \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb r\u1ea5t l\u00e2u v\u1ec1 tr\u01b0\u1edbc, ngay t\u1ea1i th\u1eddi \u0111i\u1ec3m c\u00e2y mau ch\u00f3ng b\u01b0\u1edbc v\u00e0o k\u1ef3 th\u00e0nh th\u1ee5c v\u00e0 nh\u00e2n gi\u1ed1ng.","\u20142\u26059\u2014 TI\u1ebeN V\u1ec0 PH\u01af\u01a0NG B\u1eaeC! C\u00e2y kh\u00f4ng bi\u1ebft \u0111i. Ai c\u0169ng bi\u1ebft \u0111i\u1ec1u \u0111\u00f3. M\u1eb7c d\u00f9 v\u1eady, ch\u00fang c\u1ea7n ph\u1ea3i r\u1eddi nh\u00e0 chu du b\u1eb1ng c\u00e1ch n\u00e0y hay c\u00e1ch kh\u00e1c. Nh\u01b0ng ch\u00fang \u0111i th\u1ebf n\u00e0o khi m\u00e0 ch\u1eb3ng c\u00f3 ch\u00e2n ch\u1ee9? C\u00e2u tr\u1ea3 l\u1eddi n\u1eb1m trong vi\u1ec7c chuy\u1ec3n d\u1eddi sang th\u1ebf h\u1ec7 ti\u1ebfp theo. M\u1ed7i c\u00e2y \u0111\u1ec1u ph\u1ea3i \u1edf l\u1ea1i n\u01a1i m\u00e0 ch\u00fang \u0111\u00e3 c\u1eafm r\u1ec5 khi c\u00f2n l\u00e0 m\u1ed9t m\u1ea7m non. Tuy v\u1eady, ch\u00fang c\u00f3 th\u1ec3 sinh s\u00f4i, v\u00e0 trong gi\u00e2y ph\u00fat ng\u1eafn ng\u1ee7i khi ph\u00f4i c\u00e2y v\u1eabn \u0111\u01b0\u1ee3c h\u1ea1t bao b\u1ecdc, th\u00ec ch\u00fang c\u00f2n t\u1ef1 do. Kho\u1ea3nh kh\u1eafc khi ch\u00fang r\u01a1i t\u1eeb tr\u00ean c\u00e2y xu\u1ed1ng th\u00ec h\u00e0nh tr\u00ecnh s\u1ebd b\u1eaft \u0111\u1ea7u. M\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y r\u1ea5t v\u1ed9i v\u00e3. Ch\u00fang trang b\u1ecb cho con ch\u00e1u m\u00ecnh nh\u1eefng chi\u1ebfc l\u00f4ng m\u1ecbn \u0111\u1ec3 ch\u00fang c\u00f3 th\u1ec3 cu\u1ed1n theo c\u01a1n gi\u00f3 k\u1ebf ti\u1ebfp, nh\u1eb9 t\u1ef1a l\u00f4ng h\u1ed3ng v\u1eady. Nh\u1eefng lo\u00e0i d\u1ef1a v\u00e0o chi\u1ebfn l\u01b0\u1ee3c n\u00e0y ph\u1ea3i ph\u00e1t tri\u1ec3n nh\u1eefng h\u1ea1t gi\u1ed1ng b\u00e9 x\u00edu, \u0111\u1ee7 nh\u1eb9 \u0111\u1ec3 c\u00f3 th\u1ec3 bay l\u01a1 l\u1eedng. D\u01b0\u01a1ng v\u00e0 li\u1ec5u t\u1ea1o ra nh\u1eefng k\u1ebb bi\u1ebft bay t\u00ed hon nh\u01b0 v\u1eady v\u00e0 ti\u1ec5n ch\u00fang b\u01b0\u1edbc l\u00ean h\u00e0nh tr\u00ecnh d\u00e0i g\u1ea7n n\u1eeda d\u1eb7m (804,672 m). L\u1ee3i th\u1ebf c\u1ee7a vi\u1ec7c di chuy\u1ec3n m\u1ed9t qu\u00e3ng \u0111\u01b0\u1eddng xa s\u1ebd b\u00f9 tr\u1eeb cho b\u1ea5t l\u1ee3i l\u00e0 h\u1ea1t gi\u1ed1ng ch\u1ee9a r\u1ea5t \u00edt th\u1ee9c \u0103n d\u1ef1 ph\u00f2ng. H\u1ea1t gi\u1ed1ng \u0111\u00e3 n\u1ea3y m\u1ea7m s\u1ebd nhanh ch\u00f3ng s\u1eed d\u1ee5ng h\u1ebft ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef c\u1ee7a m\u00ecnh, khi\u1ebfn n\u00f3 c\u1ef1c k\u1ef3 d\u1ec5 b\u1ecb ch\u1ebft \u0111\u00f3i v\u00e0 ch\u1ebft kh\u00e1t. H\u1ea1t gi\u1ed1ng c\u1ee7a d\u01b0\u01a1ng, phong, tr\u0103n, t\u1ea7n b\u00ec v\u00e0 c\u00e1c c\u00e2y ng\u00e0nh th\u00f4ng th\u00ec h\u01a1i n\u1eb7ng c\u00e2n h\u01a1n m\u1ed9t ch\u00fat. V\u1edbi tr\u1ecdng l\u01b0\u1ee3ng nh\u01b0 v\u1eady, bay b\u1eb1ng l\u1edbp kho\u00e1c l\u00f4ng m\u1ecbn nh\u1eb9 kh\u00f4ng c\u00f2n kh\u1ea3 thi n\u1eefa, v\u00ec v\u1eady nh\u1eefng c\u00e2y n\u00e0y trang b\u1ecb cho qu\u1ea3 c\u1ee7a ch\u00fang nh\u1eefng ph\u01b0\u01a1ng ti\u1ec7n tr\u1ee3 gi\u00fap bay l\u01b0\u1ee3n kh\u00e1c. M\u1ed9t s\u1ed1 lo\u00e0i, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c c\u00e2y ng\u00e0nh th\u00f4ng, c\u00f3 ki\u1ec3u thi\u1ebft k\u1ebf c\u00e1nh hi\u1ec7u qu\u1ea3 d\u00e0nh cho h\u1ea1t gi\u1ed1ng c\u1ee7a ch\u00fang, ho\u1ea1t \u0111\u1ed9ng r\u1ea5t t\u1ed1t trong vi\u1ec7c gi\u00fap h\u1ea1t r\u01a1i ch\u1eadm l\u1ea1i. N\u1ebfu c\u00f3 m\u1ed9t c\u01a1n","b\u00e3o th\u1ed5i qua khi c\u00e1c h\u1ea1t gi\u1ed1ng \u0111ang r\u01a1i xu\u1ed1ng, th\u00ec ch\u00fang c\u00f3 th\u1ec3 di chuy\u1ec3n \u0111\u01b0\u1ee3c \u0111\u1ebfn kho\u1ea3ng m\u1ed9t d\u1eb7m (1,60934 km). C\u00e1c lo\u00e0i ra qu\u1ea3 \u201cn\u1eb7ng c\u00e2n\u201d, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1ed3i, d\u1ebb, hay d\u1ebb gai, kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 \u0111i \u0111\u01b0\u1ee3c qu\u00e3ng \u0111\u01b0\u1eddng xa \u0111\u1ebfn th\u1ebf. Do \u0111\u00f3, ch\u00fang tr\u00e1nh vi\u1ec7c t\u1ea1o ra b\u1ea5t k\u1ef3 lo\u1ea1i c\u1ea5u tr\u00fac h\u1ed7 tr\u1ee3 n\u00e0o, thay v\u00e0o \u0111\u00f3, ch\u00fang k\u1ebft \u0111\u1ed3ng minh v\u1edbi th\u1ebf gi\u1edbi lo\u00e0i v\u1eadt. Chu\u1ed9t, s\u00f3c, v\u00e0 chim gi\u1ebb c\u00f9i y\u00eau th\u00edch nh\u1eefng h\u1ea1t gi\u1ed1ng nhi\u1ec1u d\u1ea7u v\u00e0 ch\u1ee9a tinh b\u1ed9t. Ch\u00fang nh\u00e9t c\u00e1c h\u1ea1t n\u00e0y v\u00e0o n\u1ec1n r\u1eebng \u0111\u1ec3 l\u00e0m ch\u1ed7 th\u1ee9c \u0103n d\u1ef1 tr\u1eef cho m\u00f9a \u0111\u00f4ng, v\u00e0 h\u1ea1t gi\u1ed1ng th\u01b0\u1eddng n\u1eb1m l\u1ea1i n\u01a1i \u0111\u00f3, b\u1ecb th\u1ea5t l\u1ea1c hay kh\u00f4ng c\u1ea7n t\u1edbi n\u1eefa. Th\u1ec9nh tho\u1ea3ng, m\u1ed9t con c\u00fa l\u00f4ng hung s\u00e0 xu\u1ed1ng v\u00e0 m\u1ed9t con chu\u1ed9t c\u1ed5 v\u00e0ng tr\u1edf th\u00e0nh b\u1eefa \u0103n cho c\u00fa. V\u00e0 nh\u01b0 th\u1ebf, lo\u00e0i g\u1eb7m nh\u1ea5m t\u00ed hon n\u00e0y \u0111\u00e3 \u0111\u00f3ng g\u00f3p cho s\u1ef1 s\u1ed1ng c\u1ee7a th\u1ebf h\u1ec7 c\u00e2y xanh k\u1ebf ti\u1ebfp, m\u1eb7c d\u00f9 c\u1ed1ng hi\u1ebfn n\u00e0y r\u1ea5t b\u00e9 nh\u1ecf. Nh\u1eefng con chu\u1ed9t n\u00e0y th\u01b0\u1eddng ch\u00f4n th\u1ee9c \u0103n d\u1ef1 tr\u1eef cho m\u00f9a \u0111\u00f4ng tr\u1ef1c ti\u1ebfp d\u01b0\u1edbi g\u1ed1c c\u1ee7a nh\u1eefng th\u00e2n c\u00e2y s\u1ed3i v\u0129 \u0111\u1ea1i \u2013 lo\u00e0i m\u00e0 ch\u00fang th\u01b0\u1eddng thu nh\u1eb7t h\u1ea1t. C\u00f3 r\u1ea5t nhi\u1ec1u h\u1ed1 nh\u1ecf kh\u00f4 r\u00e1o b\u00ean d\u01b0\u1edbi r\u1ec5 c\u00e2y, v\u00e0 nh\u1eefng sinh v\u1eadt nh\u1ecf n\u00e0y th\u00edch s\u1ed1ng \u1edf \u0111\u00f3. N\u1ebfu m\u1ed9t con chu\u1ed9t chuy\u1ec3n v\u00e0o s\u1ed1ng trong nh\u1eefng h\u1ed1 n\u00e0y, b\u1ea1n s\u1ebd th\u1ea5y v\u1ecf c\u1ee7a nh\u1eefng h\u1ea1t d\u1ebb gai \u0111\u00e3 b\u1ecb \u0103n h\u1ebft ch\u1ea5t th\u00e0nh \u0111\u1ed1ng ngay ph\u00eda tr\u01b0\u1edbc. \u00cdt nh\u1ea5t m\u1ed9t \u00edt trong s\u1ed1 nh\u1eefng kho d\u1ef1 tr\u1eef n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ch\u00f4n d\u01b0\u1edbi n\u1ec1n r\u1eebng tr\u1ed1ng tr\u1ea3i, c\u00e1ch n\u01a1i c\u00e2y \u0111\u1ee9ng v\u00e0i yard. Sau c\u00e1i ch\u1ebft c\u1ee7a con chu\u1ed9t, c\u00e1c kho h\u1ea1t n\u00e0y s\u1ebd n\u1ea3y m\u1ea7m v\u00e0o m\u00f9a xu\u00e2n k\u1ebf ti\u1ebfp v\u00e0 tr\u1edf th\u00e0nh khu r\u1eebng m\u1edbi. Chim gi\u1ebb c\u00f9i v\u1eadn chuy\u1ec3n nh\u1eefng h\u1ea1t gi\u1ed1ng n\u1eb7ng c\u00e2n \u0111i xa nh\u1ea5t. Chim mang h\u1ea1t s\u1ed3i v\u00e0 h\u1ea1t d\u1ebb gai xa \u0111\u1ebfn v\u00e0i d\u1eb7m. S\u00f3c ch\u1ec9 mang h\u1ea1t \u0111i \u0111\u01b0\u1ee3c v\u00e0i tr\u0103m yard m\u00e0 th\u00f4i, trong khi chu\u1ed9t th\u00ec ch\u00f4n th\u1ee9c \u0103n d\u1ef1 tr\u1eef c\u1ee7a ch\u00fang \u1edf n\u01a1i hi\u1ebfm khi xa h\u01a1n 30 feet (9,144 m) t\u00ednh t\u1eeb ch\u1ed7 c\u00e2y \u0111\u1ee9ng. N\u00ean n\u1ebfu b\u1ea1n l\u00e0 lo\u00e0i ra tr\u00e1i \u201cn\u1eb7ng c\u00e2n\u201d, b\u1ea1n ch\u1eafc ch\u1eafn s\u1ebd ch\u1eb3ng th\u1ec3 \u0111i \u0111\u00e2u nhanh \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, l\u01b0\u1ee3ng th\u1ee9c \u0103n d\u1ef1 tr\u1eef l\u1edbn b\u00ean trong h\u1ea1t s\u1ebd l\u00e0 b\u01b0\u1edbc \u0111\u1ec7m \u0111\u1ea3m b\u1ea3o cho m\u1ea7m non c\u00f3 c\u01a1 h\u1ed9i s\u1ed1ng s\u00f3t qua n\u0103m \u0111\u1ea7u \u0111\u1eddi. \u0110i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 nh\u1eefng c\u00e2y d\u01b0\u01a1ng v\u00e0 c\u00e2y li\u1ec5u ra h\u1ea1t \u201cnh\u1eb9 c\u00e2n\u201d c\u00f3 th\u1ec3 m\u1edf ra nh\u1eefng khu v\u1ef1c s\u1ed1ng m\u1edbi nhanh ch\u00f3ng h\u01a1n - ch\u1eb3ng h\u1ea1n, khi c\u00f3 m\u1ed9t v\u1ee5 phun tr\u00e0o n\u00fai l\u1eeda khi\u1ebfn v\u00e1n b\u00e0i s\u1ef1","g\u1ea1 \u1ed9 \u1ee5p \u1ef1 s\u1ed1ng b\u1ecb x\u00e1o h\u1ebft l\u00ean v\u00e0 cu\u1ed9c ch\u01a1i b\u1eaft \u0111\u1ea7u l\u1ea1i t\u1eeb \u0111\u1ea7u. Nh\u01b0ng v\u00ec nh\u1eefng c\u00e2y n\u00e0y kh\u00f4ng s\u1ed1ng th\u1ecd v\u00e0 \u0111\u1ec3 r\u1ea5t nhi\u1ec1u \u00e1nh s\u00e1ng l\u1ecdt xu\u1ed1ng n\u1ec1n \u0111\u1ea5t, nh\u1eefng lo\u00e0i c\u00e2y \u0111\u1ebfn n\u01a1i sau \u0111\u00f3 cu\u1ed1i c\u00f9ng s\u1ebd chi\u1ebfm l\u0129nh khu v\u1ef1c. Nh\u01b0ng v\u00ec sao l\u1ea1i ph\u1ea3i \u0111i chu du nh\u01b0 th\u1ebf? R\u1eebng kh\u00f4ng th\u1ec3 c\u1ee9 \u0111\u1ee9ng ngay ch\u1ed7 c\u0169, n\u01a1i m\u1ecdi th\u1ee9 \u0111\u1ec1u d\u1ec5 ch\u1ecbu v\u00e0 tho\u1ea3i m\u00e1i \u00e0? M\u1edf ra nh\u1eefng n\u01a1i \u1edf m\u1edbi l\u00e0 c\u1ea7n thi\u1ebft, ch\u1ee7 y\u1ebfu do kh\u00ed h\u1eadu lu\u00f4n lu\u00f4n thay \u0111\u1ed5i. \u0110\u00fang l\u00e0 vi\u1ec7c thay \u0111\u1ed5i di\u1ec5n ra r\u1ea5t ch\u1eadm, qua t\u1eadn h\u00e0ng tr\u0103m n\u0103m, nh\u01b0ng cu\u1ed1i c\u00f9ng, d\u00f9 cho c\u00e2y c\u00f3 s\u1eb5n s\u1ee9c ch\u1ecbu \u0111\u1ef1ng c\u1ee1 n\u00e0o \u0111i ch\u0103ng n\u1eefa, th\u00ec kh\u00ed h\u1eadu c\u0169ng s\u1ebd tr\u1edf n\u00ean qu\u00e1 \u1ea5m, qu\u00e1 l\u1ea1nh, qu\u00e1 kh\u00f4, ho\u1eb7c qu\u00e1 \u01b0\u1edbt \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 lo\u00e0i c\u1ee5 th\u1ec3. Sau \u0111\u00f3, c\u00e2y ph\u1ea3i kh\u1edfi h\u00e0nh \u0111\u1ebfn v\u00f9ng \u0111\u1ea5t kh\u00e1c, \u0111i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 ch\u00fang ph\u1ea3i cu\u1ed1n g\u00f3i \u0111\u1ed3 \u0111\u1ea1c v\u00e0 chuy\u1ec3n \u0111i. Hi\u1ec7n t\u1ea1i, vi\u1ec7c di tr\u00fa nh\u01b0 v\u1eady \u0111ang di\u1ec5n ra \u1edf nh\u1eefng khu r\u1eebng Trung \u00c2u. Nguy\u00ean nh\u00e2n kh\u00f4ng nh\u1eefng do bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu \u2013 n\u00f3 th\u1ec3 hi\u1ec7n cho ch\u00fang ta th\u1ea5y qua vi\u1ec7c nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh \u0111\u00e3 t\u0103ng 1,4 \u0111\u1ed9 Fahrenheit (kho\u1ea3ng g\u1ea7n 1 \u0111\u1ed9 C), m\u00e0 c\u00f2n do bi\u1ebfn \u0111\u1ed5i khi chuy\u1ec3n t\u1eeb cu\u1ed1i k\u1ef7 b\u0103ng h\u00e0 sang m\u1ed9t k\u1ef7 nguy\u00ean \u1ea5m \u00e1p h\u01a1n. K\u1ef7 b\u0103ng h\u00e0 c\u00f3 \u1ea3nh h\u01b0\u1edfng v\u00f4 c\u00f9ng l\u1edbn. V\u00ec qua h\u00e0ng th\u1ebf k\u1ef7, th\u1eddi ti\u1ebft c\u1ee9 ng\u00e0y c\u00e0ng l\u1ea1nh h\u01a1n, n\u00ean c\u00e2y ph\u1ea3i l\u00f9i \u0111\u1ebfn nh\u1eefng v\u00f9ng \u0111\u1ea5t xa x\u00f4i h\u01a1n v\u1ec1 ph\u00eda nam. N\u1ebfu s\u1ef1 thay \u0111\u1ed5i di\u1ec5n ra ch\u1eadm ch\u1ea1p qua nhi\u1ec1u th\u1ebf h\u1ec7, c\u00e1c c\u00e2y \u1edf Trung \u00c2u, ch\u1eb3ng h\u1ea1n, s\u1ebd th\u00e0nh c\u00f4ng chuy\u1ec3n \u0111\u1ebfn c\u01b0 ng\u1ee5 \u1edf khu v\u1ef1c \u0110\u1ecba Trung H\u1ea3i. Nh\u01b0ng n\u1ebfu b\u0103ng gi\u00e1 ti\u1ebfn b\u01b0\u1edbc qu\u00e1 nhanh, n\u00f3 s\u1ebd ch\u00f4n v\u00f9i khu r\u1eebng v\u00e0 nu\u1ed1t ch\u1eedng c\u00e1c lo\u00e0i c\u00f2n \u0111ang l\u00ea b\u01b0\u1edbc ch\u1eadm ch\u1ea1p. \u1ede Trung \u00c2u ba tri\u1ec7u n\u0103m tr\u01b0\u1edbc, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y kh\u00f4ng ch\u1ec9 lo\u00e0i d\u1ebb gai b\u1ea3n \u0111\u1ecba ch\u00fang ta c\u00f3 ng\u00e0y nay, m\u00e0 c\u00f2n nh\u1eefng c\u00e2y d\u1ebb gai l\u00e1 l\u1edbn n\u1eefa. M\u1eb7c d\u00f9 lo\u00e0i d\u1ebb gai \u0111\u00e3 th\u00e0nh c\u00f4ng trong vi\u1ec7c v\u01b0\u1ee3t \u0111\u01b0\u1eddng \u0111\u1ebfn ph\u00eda nam ch\u00e2u \u00c2u, nh\u01b0ng nh\u1eefng c\u00e2y d\u1ebb gai l\u00e1 l\u1edbn \u00edt nhanh nh\u1eb9n h\u01a1n th\u00ec \u0111\u00e3 ch\u1ebft h\u1ebft. Nguy\u00ean do c\u00e1i ch\u1ebft c\u1ee7a ch\u00fang ch\u00ednh l\u00e0 d\u00e3y n\u00fai Alps. Khu v\u1ef1c n\u00fai non n\u00e0y t\u1ea1o n\u00ean m\u1ed9t r\u00e0o c\u1ea3n t\u1ef1 nhi\u00ean ch\u1eafn ngang l\u1ed1i tho\u00e1t c\u1ee7a c\u00e2y. \u0110\u1ec3 v\u01b0\u1ee3t qua d\u00e3y Alps, c\u00e2y \u0111\u1ea7u ti\u00ean ph\u1ea3i \u0111\u1ecbnh c\u01b0 \u0111\u01b0\u1ee3c tr\u00ean ch\u1ed7 \u0111\u1ecba h\u00ecnh ch\u00f3t v\u00f3t tr\u01b0\u1edbc khi l\u1ea7n n\u1eefa t\u1ee5t xu\u1ed1ng n\u01a1i c\u00f3 \u0111\u1ed9 cao d\u1ec5 ch\u1ecbu h\u01a1n. Nh\u01b0ng","\u1ee5g \u1ed9 \u1ecb g nh\u1eefng ch\u1ed7 cao nh\u01b0 th\u1ebf th\u01b0\u1eddng qu\u00e1 l\u1ea1nh \u0111\u1ed1i v\u1edbi nhi\u1ec1u lo\u00e0i c\u00e2y, th\u1eadm ch\u00ed d\u00f9 l\u00e0 trong th\u1eddi k\u1ef3 gian b\u0103ng\u273d, v\u00ec v\u1eady v\u1eadn may c\u1ee7a nhi\u1ec1u lo\u00e0i k\u1ebft th\u00fac khi ch\u00fang \u0111\u1ebfn \u0111\u01b0\u1eddng gi\u1edbi h\u1ea1n c\u00e2y c\u1ed1i. Ng\u00e0y nay, b\u1ea1n kh\u00f4ng c\u00f2n t\u00ecm \u0111\u01b0\u1ee3c lo\u00e0i d\u1ebb gai l\u00e1 l\u1edbn \u1edf Trung \u00c2u, nh\u01b0ng b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y ch\u00fang \u1edf ph\u00eda \u0111\u00f4ng B\u1eafc M\u1ef9, n\u01a1i ch\u00fang \u0111\u01a1n gi\u1ea3n \u0111\u01b0\u1ee3c bi\u1ebft d\u01b0\u1edbi c\u00e1i t\u00ean d\u1ebb gai ch\u00e2u M\u1ef9. (Nh\u1eefng chi\u1ebfc l\u00e1 l\u1edbn c\u1ee7a c\u00e2y \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn trong t\u00ean Latin c\u1ee7a ch\u00fang: Fagus grandifolia \u2013 \u201cgrandis\u201d c\u00f3 ngh\u0129a l\u00e0 l\u1edbn v\u00e0 \u201cfolia\u201d c\u00f3 ngh\u0129a l\u00e0 l\u00e1). D\u1ebb gai ch\u00e2u M\u1ef9 s\u1ed1ng s\u00f3t v\u00ec kh\u00f4ng c\u00f3 nh\u1eefng khu v\u1ef1c n\u00fai non phi\u1ec1n ph\u1ee9c \u1edf ph\u00eda \u0111\u00f4ng t\u00e2y ch\u1eafn ngang b\u01b0\u1edbc di chuy\u1ec3n c\u1ee7a ch\u00fang t\u1eeb ph\u00eda b\u1eafc sang ph\u00eda nam tr\u00ean l\u1ee5c \u0111\u1ecba B\u1eafc M\u1ef9. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u1ebfn \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng nam m\u00e0 kh\u00f4ng g\u1eb7p tr\u1edf ng\u1ea1i, r\u1ed3i l\u1ea1i di chuy\u1ec3n tr\u1edf v\u1ec1 ph\u00eda b\u1eafc sau khi k\u1ef7 b\u0103ng h\u00e0 k\u1ebft th\u00fac. C\u00f9ng v\u1edbi m\u1ed9t \u00edt lo\u00e0i c\u00e2y kh\u00e1c, d\u1ebb gai \u1edf Trung \u00c2u b\u1eb1ng c\u00e1ch n\u00e0o \u0111\u00f3 \u0111\u00e3 th\u00e0nh c\u00f4ng v\u01b0\u1ee3t qua d\u00e3y Alps v\u00e0 s\u1ed1ng s\u00f3t trong nh\u1eefng khu v\u1ef1c \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 cho \u0111\u1ebfn th\u1eddi k\u1ef3 gian b\u0103ng hi\u1ec7n t\u1ea1i c\u1ee7a ch\u00fang ta. Con \u0111\u01b0\u1eddng r\u1ed9ng m\u1edf \u0111\u1ed1i v\u1edbi nh\u1eefng lo\u00e0i t\u01b0\u01a1ng \u0111\u1ed1i \u00edt n\u00e0y trong h\u00e0ng ng\u00e0n n\u0103m, v\u00e0 ng\u00e0y nay ch\u00fang \u0111ang h\u00e0nh qu\u00e2n v\u1ec1 ph\u00eda b\u1eafc, v\u1eabn theo v\u1ebft b\u0103ng tan nh\u01b0 tr\u01b0\u1edbc kia ch\u00fang t\u1eebng l\u00e0m. Ngay khi kh\u00ed h\u1eadu \u1ea5m l\u00ean, nh\u1eefng m\u1ea7m non m\u1edbi nh\u00fa l\u1ea1i g\u1eb7p may m\u1eafn l\u1ea7n n\u1eefa. Ch\u00fang ph\u00e1t tri\u1ec3n th\u00e0nh nh\u1eefng c\u00e2y tr\u01b0\u1edfng th\u00e0nh v\u00e0 ph\u00e1t t\u00e1n nh\u1eefng h\u1ea1t gi\u1ed1ng m\u1edbi ti\u1ebfn d\u1ea7n v\u1ec1 ph\u01b0\u01a1ng b\u1eafc, t\u1eebng d\u1eb7m t\u1eebng d\u1eb7m m\u1ed9t. Nh\u00e2n ti\u1ec7n, t\u1ed1c \u0111\u1ed9 h\u00e0nh tr\u00ecnh trung b\u00ecnh c\u1ee7a d\u1ebb gai l\u00e0 kho\u1ea3ng m\u1ed9t ph\u1ea7n t\u01b0 d\u1eb7m m\u1ed9t n\u0103m. D\u1ebb gai \u0111\u1eb7c bi\u1ec7t ch\u1eadm ch\u1ea1p. H\u1ea1t c\u1ee7a ch\u00fang th\u01b0\u1eddng \u00edt \u0111\u01b0\u1ee3c chim gi\u1ebb c\u00f9i mang \u0111i h\u01a1n h\u1ea1t s\u1ed3i, trong khi c\u00e1c lo\u00e0i kh\u00e1c th\u00ec ph\u00e1t t\u00e1n nh\u1edd gi\u00f3 v\u00e0 r\u1ea5t nhanh ch\u00f3ng chi\u1ebfm l\u1ea5y nh\u1eefng khu v\u1ef1c tr\u1ed1ng tr\u1ea3i. Khi nh\u1eefng c\u00e2y d\u1ebb gai d\u1ec5 t\u00ednh quay tr\u1edf l\u1ea1i v\u00e0o kho\u1ea3ng b\u1ed1n ng\u00e0n n\u0103m tr\u01b0\u1edbc, khu r\u1eebng \u0111\u00e3 b\u1ecb s\u1ed3i v\u00e0 ph\u1ec9 chi\u1ebfm gi\u1eef. \u0110\u00f3 ch\u1eb3ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 l\u1edbn \u0111\u1ed1i v\u1edbi d\u1ebb gai, v\u00e0 b\u1ea1n \u0111\u00e3 qu\u00e1 quen v\u1edbi chi\u1ebfn thu\u1eadt c\u1ee7a ch\u00fang r\u1ed3i. Ch\u00fang \u01b0a b\u00f3ng r\u00e2m h\u01a1n nhi\u1ec1u lo\u00e0i c\u00e2y kh\u00e1c, do \u0111\u00f3, ch\u00fang ch\u1eb3ng g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c n\u1ea3y m\u1ea7m b\u00ean d\u01b0\u1edbi nh\u1eefng c\u00e2y kia. L\u01b0\u1ee3ng \u00e1nh s\u00e1ng nh\u1ecf nhoi m\u00e0 s\u1ed3i v\u00e0 ph\u1ec9","\u0111\u1ec3 l\u1ecdt xu\u1ed1ng m\u1eb7t \u0111\u1ea5t l\u00e0 \u0111\u00e3 \u0111\u1ee7 cho c\u00e1c \u201cchinh t\u01b0\u1edbng\u201d\u273d ti\u1ebfp t\u1ee5c cao l\u00ean, r\u1ed3i ng\u00e0y kia ch\u00fang s\u1ebd m\u1ecdc xuy\u00ean qua t\u00e1n c\u1ee7a \u0111\u1ed1i th\u1ee7. \u0110i\u1ec1u ph\u1ea3i x\u1ea3y ra \u0111\u00e3 x\u1ea3y ra. Nh\u1eefng c\u00e2y d\u1ebb gai l\u1edbn l\u00ean, v\u01b0\u1ee3t m\u1eb7t nh\u1eefng lo\u00e0i \u0111\u00e3 \u0111\u1ebfn \u0111\u00f3 s\u1edbm h\u01a1n v\u00e0 c\u01b0\u1edbp \u0111i ngu\u1ed3n \u00e1nh s\u00e1ng m\u00e0 ch\u00fang c\u1ea7n \u0111\u1ec3 s\u1ed1ng s\u00f3t. Cu\u1ed9c h\u00e0nh qu\u00e2n m\u1eebng th\u1eafng l\u1ee3i t\u00e0n nh\u1eabn kia tr\u1ea3i d\u00e0i v\u1ec1 ph\u01b0\u01a1ng b\u1eafc xa x\u00f4i nh\u01b0 mi\u1ec1n nam Th\u1ee5y \u0110i\u1ec3n ng\u00e0y nay, nh\u01b0ng th\u1ebf v\u1eabn ch\u01b0a xong chuy\u1ec7n \u0111\u00e2u. Ho\u1eb7c, n\u00f3i \u0111\u00fang h\u01a1n, chuy\u1ec7n s\u1ebd v\u1eabn ch\u01b0a xong n\u1ebfu nh\u01b0 con ng\u01b0\u1eddi kh\u00f4ng nh\u00fang tay v\u00e0o. Khi d\u1ebb gai \u0111\u1ebfn n\u01a1i, th\u00ec t\u1ed5 ti\u00ean c\u1ee7a ng\u01b0\u1eddi ch\u00e2u \u00c2u c\u0169ng b\u1eaft \u0111\u1ea7u thay \u0111\u1ed5i h\u1ec7 sinh th\u00e1i r\u1eebng tr\u00ean di\u1ec7n r\u1ed9ng. H\u1ecd li\u00ean t\u1ee5c ph\u00e1t quang c\u00e2y c\u1ed1i xung quanh ch\u1ed7 c\u01b0 ng\u1ee5 \u0111\u1ec3 l\u1ea5y \u0111\u1ea5t tr\u1ed3ng tr\u1ecdt v\u00e0 \u0111\u1ed1n s\u1ea1ch th\u00eam nhi\u1ec1u khu v\u1ef1c kh\u00e1c \u0111\u1ec3 l\u00e0m ch\u1ed7 ch\u0103n nu\u00f4i gia s\u00fac. Th\u1eadm ch\u00ed nh\u01b0 th\u1ebf v\u1eabn ch\u01b0a \u0111\u1ee7, n\u00ean h\u1ecd \u0111\u01a1n gi\u1ea3n c\u1ee9 xua tr\u00e2u b\u00f2 c\u00f9ng l\u1ee3n c\u1ee7a h\u1ecd v\u00e0o r\u1eebng. \u0110\u1ed1i v\u1edbi d\u1ebb gai, \u0111\u1ea5y th\u1eadt l\u00e0 th\u1ea3m h\u1ecda. Con ch\u00e1u c\u1ee7a ch\u00fang ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng qua h\u00e0ng th\u1ebf k\u1ef7 tr\u00ean m\u1eb7t \u0111\u1ea5t tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c ph\u00e9p l\u1edbn l\u00ean. Trong th\u1eddi gian \u0111\u00f3, nh\u1eefng b\u00fap ch\u1ed3i \u1edf ng\u1ecdn c\u1ee7a ch\u00fang ch\u1eb3ng c\u00f3 s\u1ee9c t\u1ef1 v\u1ec7 v\u00e0 ph\u00f3 m\u1eb7c s\u1ed1 ph\u1eadn cho l\u0169 th\u00fa g\u1eb7m th\u1ef1c v\u1eadt \u0111\u1ecbnh \u0111o\u1ea1t. Ban \u0111\u1ea7u, c\u00f3 r\u1ea5t \u00edt \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa \u1edf xung quanh, v\u00ec nh\u1eefng khu r\u1eebng r\u1eadm r\u1ea1p cung c\u1ea5p r\u1ea5t \u00edt th\u1ee9c \u0103n. Tr\u01b0\u1edbc khi con ng\u01b0\u1eddi \u0111\u1ebfn \u0111\u00f3, c\u01a1 h\u1ed9i \u0111\u1ec3 d\u1ebb gai \u0111\u1ee9ng y\u00ean \u0111\u1ea5y trong v\u00f2ng hai tr\u0103m n\u0103m m\u00e0 kh\u00f4ng b\u1ecb qu\u1ea5y nhi\u1ec5u hay b\u1ecb \u0103n m\u1ea5t l\u00e0 r\u1ea5t l\u1edbn. Nh\u01b0ng gi\u1edd th\u00ec d\u00f2ng ng\u01b0\u1eddi ch\u0103n th\u1ea3 c\u1ee9 li\u00ean t\u1ee5c k\u00e9o \u0111\u1ebfn c\u00f9ng v\u1edbi l\u0169 gia s\u00fac h\u00e1u \u0111\u00f3i c\u1ee7a h\u1ecd, ng\u1ea5u nghi\u1ebfn h\u1ebft s\u1ea1ch nh\u1eefng b\u00fap ch\u1ed3i th\u01a1m ngon. \u1ede nh\u1eefng khu v\u1ef1c m\u00e0 \u00e1nh s\u00e1ng gi\u1edd \u0111\u00e3 l\u1ecdt xu\u1ed1ng v\u00ec c\u00e2y \u0111\u00e3 b\u1ecb \u0111\u1ed1n h\u1ea1, nh\u1eefng lo\u00e0i c\u00e2y kh\u00e1c tr\u01b0\u1edbc \u0111\u00e2y t\u1eebng b\u1ecb d\u1ebb gai che b\u00f3ng v\u01b0\u01a1n l\u00ean. \u0110i\u1ec1u n\u00e0y g\u00e2y c\u1ea3n tr\u1edf nghi\u00eam tr\u1ecdng cho vi\u1ec7c di c\u01b0 h\u1eadu k\u1ef7 b\u0103ng h\u00e0 c\u1ee7a d\u1ebb gai, v\u00e0 \u0111\u1ebfn t\u1eadn h\u00f4m nay, c\u00f3 nh\u1eefng khu v\u1ef1c \u1edf ch\u00e2u \u00c2u m\u00e0 d\u1ebb gai v\u1eabn ch\u01b0a chi\u1ebfm l\u0129nh \u0111\u01b0\u1ee3c. V\u00e0i th\u1ebf k\u1ef7 tr\u01b0\u1edbc, vi\u1ec7c s\u0103n b\u1eafn trong nh\u1eefng khu r\u1eebng ch\u00e2u \u00c2u xu\u1ea5t hi\u1ec7n, v\u00e0 ng\u01b0\u1ee3c \u0111\u1eddi thay, vi\u1ec7c \u1ea5y l\u1ea1i l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 s\u1ed1 l\u01b0\u1ee3ng h\u01b0\u01a1u nai v\u00e0 l\u1ee3n l\u00f2i. Nh\u1edd ch\u01b0\u01a1ng tr\u00ecnh cho \u0103n di\u1ec7n r\u1ed9ng c\u1ee7a c\u00e1c th\u1ee3 s\u0103n \u2013 nh\u1eefng ng\u01b0\u1eddi h\u1ea7u nh\u01b0 ch\u1ec9 c\u00f3 h\u1ee9ng th\u00fa v\u1edbi vi\u1ec7c","t\u0103ng s\u1ed1 l\u01b0\u1ee3ng h\u01b0\u01a1u \u0111\u1ef1c c\u00f3 s\u1eebng, s\u1ed1 h\u01b0\u01a1u nai gia t\u0103ng \u0111\u1ebfn n\u1ed7i t\u1eadn ng\u00e0y nay \u0111\u00e3 g\u1ea5p n\u0103m l\u1ea7n m\u1ee9c t\u1ef1 nhi\u00ean. C\u00e1c v\u00f9ng n\u00f3i ti\u1ebfng \u0110\u1ee9c t\u1eadp trung l\u01b0\u1ee3ng th\u00fa \u0103n c\u1ecf cao nh\u1ea5t tr\u00ean th\u1ebf gi\u1edbi, v\u00ec v\u1eady nh\u1eefng c\u00e2y d\u1ebb gai nh\u1ecf d\u1ea7n ph\u00e1t hi\u1ec7n r\u1eb1ng ch\u00fang ng\u00e0y c\u00e0ng kh\u00f3 s\u1ed1ng s\u00f3t h\u01a1n. C\u00f2n ng\u00e0nh l\u00e2m nghi\u1ec7p th\u00ec c\u1ee9 h\u1ea1n ch\u1ebf s\u1ef1 ph\u00e1t t\u00e1n c\u1ee7a ch\u00fang. \u1ede mi\u1ec1n nam Th\u1ee5y \u0110i\u1ec3n, n\u01a1i d\u1ebb gai v\u1ed1n c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n tho\u1ea3i m\u00e1i, c\u1ee9 h\u1ebft \u0111\u1ed3n \u0111i\u1ec1n v\u00e2n sam n\u00e0y \u0111\u1ebfn \u0111\u1ed3n \u0111i\u1ec1n th\u00f4ng kh\u00e1c m\u1ecdc l\u00ean. Ngo\u1ea1i tr\u1eeb m\u1ed9t s\u1ed1 c\u00e2y \u0111\u1eb7c bi\u1ec7t, r\u1ea5t kh\u00f3 t\u00ecm \u0111\u01b0\u1ee3c c\u00e2y d\u1ebb gai n\u00e0o \u1edf \u0111\u00f3 n\u1eefa. Nh\u01b0ng ch\u00fang v\u1eabn s\u1eb5n s\u00e0ng v\u00e0 \u0111ang ch\u1edd \u0111\u1ee3i. Ngay th\u1eddi kh\u1eafc con ng\u01b0\u1eddi d\u1eebng can thi\u1ec7p, ch\u00fang s\u1ebd ti\u1ebfp t\u1ee5c h\u00e0nh tr\u00ecnh di c\u01b0 l\u00ean ph\u00eda b\u1eafc c\u1ee7a m\u00ecnh. K\u1ebb di tr\u00fa ch\u1eadm ch\u1ea1p nh\u1ea5t l\u00e0 l\u00e3nh sam b\u1ea1c ch\u00e2u \u00c2u, lo\u00e0i l\u00e3nh sam b\u1ea3n \u0111\u1ecba duy nh\u1ea5t \u1edf \u0110\u1ee9c. N\u00f3 c\u00f3 t\u00ean n\u00e0y v\u00ec c\u00f3 v\u1ecf c\u00e2y m\u00e0u x\u00e1m s\u00e1ng \u2013 gi\u00fap ph\u00e2n bi\u1ec7t n\u00f3 d\u1ec5 d\u00e0ng v\u1edbi lo\u00e0i v\u00e2n sam c\u00f3 v\u1ecf m\u00e0u \u0111\u1ecf n\u00e2u. L\u00e3nh sam c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 h\u1ea7u h\u1ebft c\u00e1c lo\u00e0i c\u00e2y kh\u00e1c, \u0111\u00e3 n\u1eb1m y\u00ean ch\u1edd \u0111\u1ee3i k\u1ef7 b\u0103ng h\u00e0 qua \u0111i t\u1ea1i mi\u1ec1n nam ch\u00e2u \u00c2u, c\u00f3 l\u1ebd \u1edf \u00dd, \u1edf v\u00f9ng Balkans, v\u00e0 \u1edf T\u00e2y Ban Nha. N\u00f3 \u0111\u00e3 di c\u01b0 t\u1eeb \u0111\u00f3, \u0111i theo nh\u1eefng c\u00e2y kh\u00e1c, v\u1edbi t\u1ed1c \u0111\u1ed9 300 yard (274,32 m) m\u1ed9t n\u0103m. V\u00e2n sam v\u00e0 th\u00f4ng \u0111\u00e3 v\u01b0\u1ee3t l\u00ean d\u1eabn tr\u01b0\u1edbc v\u00ec h\u1ea1t gi\u1ed1ng c\u1ee7a ch\u00fang nh\u1eb9 h\u01a1n v\u00e0 bay t\u1ed1t h\u01a1n nhi\u1ec1u. Th\u1eadm ch\u00ed d\u1ebb gai c\u00f9ng v\u1edbi nh\u1eefng qu\u1ea3 ki\u00ean \u201cn\u1eb7ng c\u00e2n\u201d c\u1ee7a ch\u00fang c\u0169ng nhanh ch\u00e2n h\u01a1n, nh\u1edd c\u00f3 l\u0169 chim gi\u1ebb c\u00f9i gi\u00fap \u0111\u1ee1. Hi\u1ec3n nhi\u00ean, l\u00e3nh sam b\u1ea1c \u0111\u00e3 ph\u00e1t tri\u1ec3n chi\u1ebfn l\u01b0\u1ee3c sai l\u1ea7m v\u00ec h\u1ea1t c\u1ee7a ch\u00fang bay kh\u00f4ng gi\u1ecfi d\u00f9 \u0111\u00e3 \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t c\u00e1nh bu\u1ed3m nh\u1ecf \u0111\u1ec3 b\u1eaft gi\u00f3, v\u00e0 ch\u00fang qu\u00e1 nh\u1ecf \u0111\u1ec3 \u0111\u01b0\u1ee3c chim gieo r\u1eafc. Tuy v\u1eabn c\u00f3 chim \u0103n h\u1ea1t c\u1ee7a c\u00e2y l\u00e3nh sam, nh\u01b0ng s\u1ed1 \u1ea5y c\u1ef1c nh\u1ecf so v\u1edbi s\u1ed1 chim \u0103n h\u1ea1t c\u1ee7a nh\u1eefng c\u00e2y ng\u00e0nh th\u00f4ng. Chim b\u1ed5 h\u1ea1t \u2013 lo\u00e0i tuy th\u00edch h\u1ea1t th\u00f4ng Th\u1ee5y S\u0129 h\u01a1n nh\u01b0ng v\u1eabn \u0103n h\u1ea1t l\u00e3nh sam lu\u00f4n thu gom v\u00e0 d\u1ef1 tr\u1eef h\u1ea1t. Nh\u01b0ng tr\u00e1i ng\u01b0\u1ee3c v\u1edbi chim gi\u1ebb c\u00f9i \u2013 th\u01b0\u1eddng gi\u1ea5u h\u1ea1t s\u1ed3i v\u00e0 h\u1ea1t d\u1ebb gai \u1edf kh\u1eafp n\u01a1i d\u01b0\u1edbi \u0111\u1ea5t, chim b\u1ed5 h\u1ea1t gi\u1ea5u th\u1ef1c ph\u1ea9m d\u1ef1 tr\u1eef c\u1ee7a m\u00ecnh \u1edf nh\u1eefng n\u01a1i \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 v\u00e0 kh\u00f4 r\u00e1o. Th\u1eadm ch\u00ed n\u1ebfu m\u1ed9t con chim qu\u00ean m\u1ea5t m\u1ed9t hay hai h\u1ea1t gi\u1ed1ng, nh\u01b0ng v\u00ec kh\u00f4ng c\u00f3 n\u01b0\u1edbc n\u00ean nh\u1eefng h\u1ea1t b\u1ecb b\u1ecf qu\u00ean \u1ea5y c\u0169ng ch\u1eb3ng bao gi\u1edd n\u1ea3y m\u1ea7m \u0111\u01b0\u1ee3c.","Cu\u1ed9c s\u1ed1ng th\u1eadt kh\u1eafc nghi\u1ec7t \u0111\u1ed1i v\u1edbi l\u00e3nh sam b\u1ea1c. Trong khi h\u1ea7u h\u1ebft nh\u1eefng lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u1edf Trung \u00c2u cho \u0111\u1ebfn gi\u1edd v\u1eabn thu\u1eadn bu\u1ed3m xu\u00f4i gi\u00f3 ti\u1ebfn v\u1ec1 v\u00f9ng Scandinavia, nh\u1eefng c\u00e2y l\u00e3nh sam b\u1ea1c l\u1ea1i ch\u1ec9 m\u1edbi \u0111i \u0111\u01b0\u1ee3c \u0111\u1ebfn d\u00e3y n\u00fai Harz \u1edf mi\u1ec1n b\u1eafc n\u01b0\u1edbc \u0110\u1ee9c. Nh\u01b0ng n\u1ebfu \u0111\u1ebfn n\u01a1i tr\u1ec5 v\u00e0i tr\u0103m n\u0103m th\u00ec c\u00f3 kh\u00e1c bi\u1ec7t g\u00ec v\u1edbi c\u00e2y kh\u00f4ng? X\u00e9t cho c\u00f9ng, l\u00e3nh sam ch\u1ecbu \u0111\u01b0\u1ee3c b\u00f3ng r\u00e2m d\u00e0y \u0111\u1eb7c v\u00e0 c\u00f3 th\u1ec3 sinh tr\u01b0\u1edfng b\u00ean d\u01b0\u1edbi c\u00e1c c\u00e2y d\u1ebb gai. Ch\u00fang d\u1ea7n d\u1ea7n lu\u1ed3n l\u00e1ch v\u00e0o nh\u1eefng r\u1eebng gi\u00e0 \u0111\u00e3 \u1ed5n \u0111\u1ecbnh v\u00e0 cu\u1ed1i c\u00f9ng c\u00f3 th\u1ec3 l\u1edbn l\u00ean th\u00e0nh nh\u1eefng c\u00e2y xanh v\u0129 ng\u1ea1n. G\u00f3t ch\u00e2n Achilles\u273d c\u1ee7a ch\u00fang ch\u00ednh l\u00e0 ch\u00fang c\u00f3 v\u1ecb r\u1ea5t ngon \u0111\u1ed1i v\u1edbi l\u0169 h\u01b0\u01a1u. Ngay l\u00fac n\u00e0y, nh\u1eefng lo\u00e0i th\u00fa \u0103n th\u1ef1c v\u1eadt \u1ea5y \u0111ang ng\u0103n c\u1ea3n l\u00e3nh sam b\u1ea1c di c\u01b0 xa h\u01a1n v\u1ec1 ph\u01b0\u01a1ng b\u1eafc, v\u00ec ch\u00fang \u0111ang ng\u1ea5u nghi\u1ebfn b\u1eb1ng s\u1ea1ch t\u1eebng m\u1ea7m non l\u00e3nh sam cu\u1ed1i c\u00f9ng \u1edf m\u1ed9t s\u1ed1 n\u01a1i. V\u1eady t\u1ea1i sao d\u1ebb gai l\u1ea1i c\u00f3 s\u1ee9c c\u1ea1nh tranh m\u1ea1nh \u0111\u1ebfn th\u1ebf \u1edf v\u00f9ng Trung \u00c2u? Ho\u1eb7c n\u00f3i c\u00e1ch kh\u00e1c, n\u1ebfu lo\u00e0i n\u00e0y c\u00f3 th\u1ec3 \u0111\u00e1nh b\u1ea1i t\u1ea5t c\u1ea3 c\u00e1c lo\u00e0i kh\u00e1c \u1edf ch\u00e2u \u00c2u d\u1ec5 d\u00e0ng, sao l\u1ea1i kh\u00f4ng th\u1ea5y d\u1ebb gai m\u1ecdc tr\u00ean to\u00e0n th\u1ebf gi\u1edbi ch\u1ee9? C\u00e2u tr\u1ea3 l\u1eddi r\u1ea5t \u0111\u01a1n gi\u1ea3n. S\u1ee9c m\u1ea1nh v\u00e0 l\u1ee3i th\u1ebf c\u1ee7a lo\u00e0i n\u00e0y ch\u1ec9 t\u1ed3n t\u1ea1i \u1edf \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u1eadu c\u1ee7a khu v\u1ef1c n\u01a1i \u0111\u00e2y \u2013 v\u00f9ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0110\u1ea1i T\u00e2y D\u01b0\u01a1ng n\u1eb1m kh\u00e1 g\u1ea7n \u0111\u00f3. Ngo\u1ea1i tr\u1eeb nh\u1eefng n\u01a1i tu\u1ed1t tr\u00ean c\u00e1c d\u00e3y n\u00fai (d\u1ebb gai l\u1ea1i kh\u00f4ng m\u1ecdc \u1edf nh\u1eefng tri\u1ec1n d\u1ed1c tr\u00ean cao nh\u01b0 v\u1eady), nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng dao \u0111\u1ed9ng qu\u00e1 nhi\u1ec1u. M\u00f9a h\u00e8 th\u00ec m\u00e1t m\u1ebb, theo sau l\u00e0 m\u00f9a \u0111\u00f4ng \u1ea5m \u00e1p, l\u01b0\u1ee3ng m\u01b0a t\u1eeb 20 \u0111\u1ebfn 60 inch (50,8 \u2013 152,4 cm) m\u1ed9t n\u0103m, \u0111\u00fang ki\u1ec3u d\u1ebb gai th\u00edch. N\u01b0\u1edbc l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh s\u1ef1 sinh tr\u01b0\u1edfng trong r\u1eebng, v\u00e0 \u0111\u00e2y l\u00e0 \u0111i\u1ec3m m\u00e0 d\u1ebb gai th\u00e0nh c\u00f4ng l\u1edbn. \u0110\u1ec3 t\u1ea1o ra 1 pound (453,59 gram) g\u1ed7, ch\u00fang c\u1ea7n 22 gallon (83,279 l\u00edt) n\u01b0\u1edbc. \u0110\u1ea5y nghe c\u00f3 v\u1ebb nhi\u1ec1u kh\u00f4ng? H\u1ea7u h\u1ebft c\u00e1c lo\u00e0i c\u00e2y kh\u00e1c c\u1ea7n \u0111\u1ebfn 36 gallon (136,275 l\u00edt) n\u01b0\u1edbc, g\u1ea7n nh\u01b0 g\u1ea5p hai l\u1ea7n m\u1ee9c tr\u00ean, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh cho ph\u00e9p d\u1ebb gai c\u00f3 th\u1ec3 \u0111\u00e2m ch\u1ed3i n\u1ea3y l\u1ed9c nhanh ch\u00f3ng v\u00e0 k\u00ecm h\u00e3m \u0111\u01b0\u1ee3c c\u00e1c lo\u00e0i kh\u00e1c. V\u00e2n sam c\u00f3 khuynh h\u01b0\u1edbng tu n\u01b0\u1edbc \u1eebng \u1ef1c h\u01a1n so v\u1edbi nh\u1eefng c\u00e2y kh\u00e1c, v\u00ec \u1edf khu v\u1ef1c m\u00e1t m\u1ebb, \u1ea9m \u01b0\u1edbt d\u1ec5 ch\u1ecbu t\u1ea1i c\u00e1c v\u00f9ng ph\u00eda b\u1eafc xa x\u00f4i m\u00e0 ch\u00fang m\u1ecdc ch\u01b0a ai nghe \u0111\u1ebfn chuy\u1ec7n h\u1ea1n h\u00e1n bao gi\u1edd. \u1ede Trung","\u00c2u, ch\u1ec9 nh\u1eefng khu v\u1ef1c n\u1eb1m ngay b\u00ean d\u01b0\u1edbi \u0111\u01b0\u1eddng gi\u1edbi h\u1ea1n c\u00e2y c\u1ed1i m\u1edbi cung c\u1ea5p \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng m\u00e0 v\u00e2n sam y\u00eau th\u00edch. \u1ede \u0111\u1ea5y m\u01b0a r\u1ea5t nhi\u1ec1u, v\u00e0 do nhi\u1ec7t \u0111\u1ed9 th\u1ea5p n\u00ean n\u01b0\u1edbc hi\u1ebfm khi bay h\u01a1i. C\u00e2y m\u1ecdc \u1edf nh\u1eefng n\u01a1i c\u00f3 \u0111\u1ed9 cao nh\u01b0 th\u1ebf c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 ti\u00eau x\u00e0i n\u01b0\u1edbc phung ph\u00ed. Tuy nhi\u00ean, ph\u1ea7n l\u1edbn nh\u1eefng khu v\u1ef1c n\u1eb1m \u1edf n\u01a1i th\u1ea5p h\u01a1n \u0111\u1ec1u b\u1ecb nh\u1eefng c\u00e2y d\u1ebb gai c\u1ea7n ki\u1ec7m v\u01b0\u1ee3t l\u00ean d\u1eabn tr\u01b0\u1edbc. Th\u1eadm ch\u00ed trong nh\u1eefng n\u0103m kh\u00f4 h\u1ea1n, d\u1ebb gai v\u1eabn ti\u1ebfp t\u1ee5c l\u1edbn l\u00ean \u0111\u01b0\u1ee3c kha kh\u00e1 v\u00e0 nhanh ch\u00f3ng cao qua \u0111\u1ea7u nh\u1eefng k\u1ebb ti\u00eau x\u00e0i hoang ph\u00ed kia. Con ch\u00e1u \u0111\u1ed1i th\u1ee7 s\u1ebd ngh\u1eb9t th\u1edf trong l\u1edbp l\u00e1 d\u00e0y tr\u00ean m\u1eb7t \u0111\u1ea5t, nh\u01b0ng c\u00e1c m\u1ea7m d\u1ebb gai non s\u1ebd ch\u1eb3ng g\u1eb7p r\u1eafc r\u1ed1i n\u00e0o trong vi\u1ec7c ngoi \u0111\u1ea7u qua l\u1edbp l\u00e1. Vi\u1ec7c s\u1eed d\u1ee5ng \u00e1nh s\u00e1ng ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a d\u1ebb gai \u2013 \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c ch\u00fang ch\u1eb3ng \u0111\u1ec3 l\u1ea1i ch\u00fat \u00e1nh s\u00e1ng n\u00e0o cho c\u00e1c lo\u00e0i c\u00e2y kh\u00e1c \u2013 c\u00f9ng kh\u1ea3 n\u0103ng t\u1ef1 t\u1ea1o ra vi kh\u00ed h\u1eadu \u1ea9m \u01b0\u1edbt m\u00e0 ch\u00fang th\u00edch, kh\u1ea3 n\u0103ng t\u1ea1o d\u1ef1ng ngu\u1ed3n cung \u0111\u1ea5t m\u00f9n t\u1ed1t tr\u00ean m\u1eb7t \u0111\u1ea5t, v\u00e0 kh\u1ea3 n\u0103ng thu th\u1eadp n\u01b0\u1edbc b\u1eb1ng c\u00e1c c\u00e0nh c\u00e2y khi\u1ebfn d\u1ebb gai b\u1ea5t kh\u1ea3 chi\u1ebfn b\u1ea1i \u1edf Trung \u00c2u ng\u00e0y nay. Nh\u01b0ng ch\u1ec9 \u1edf ph\u1ea7n n\u00e0y tr\u00ean th\u1ebf gi\u1edbi m\u1edbi nh\u01b0 th\u1ebf th\u00f4i. Ngay khi kh\u00ed h\u1eadu \u1ea5m l\u00ean v\u00e0 tr\u1edf n\u00ean gi\u1ed1ng kh\u00ed h\u1eadu \u0110\u1ecba Trung H\u1ea3i h\u01a1n, nh\u1eefng c\u00e2y n\u00e0y s\u1ebd b\u1eaft \u0111\u1ea7u g\u1eb7p kh\u00f3 kh\u0103n. Ch\u00fang kh\u00f4ng th\u1ec3 li\u00ean t\u1ee5c ch\u1ecbu \u0111\u1ef1ng nh\u1eefng m\u00f9a h\u00e8 kh\u00f4 n\u00f3ng v\u00e0 nh\u1eefng m\u00f9a \u0111\u00f4ng r\u00e9t bu\u1ed1t, v\u00e0 ch\u00fang s\u1ebd ph\u1ea3i tr\u00e1nh ch\u1ed7 cho c\u00e1c lo\u00e0i kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1ed3i. M\u00f9a h\u00e8 n\u00f3ng b\u1ee9c v\u00e0 m\u00f9a \u0111\u00f4ng l\u1ea1nh gi\u00e1 ph\u1ed5 bi\u1ebfn kh\u1eafp \u0110\u00f4ng \u00c2u. M\u1eb7c d\u00f9 m\u00f9a h\u00e8 \u1edf v\u00f9ng Scandinavia v\u1eabn c\u00f2n c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, nh\u01b0ng nh\u1eefng th\u1eddi \u0111i\u1ec3m l\u1ea1nh h\u01a1n trong n\u0103m khi\u1ebfn v\u00f9ng vi\u1ec5n b\u1eafc c\u0169ng kh\u00f4ng ph\u1ea3i l\u00e0 n\u01a1i d\u00e0nh cho d\u1ebb gai. C\u00f2n \u1edf n\u01a1i ph\u01b0\u01a1ng nam ng\u1eadp n\u1eafng, ch\u00fang ch\u1ec9 th\u00edch \u0111\u1ecbnh c\u01b0 \u1edf nh\u1eefng v\u00f9ng cao, n\u01a1i kh\u00ed h\u1eadu kh\u00f4ng qu\u00e1 n\u00f3ng. V\u00ec c\u1ea7n ki\u1ec3u kh\u00ed h\u1eadu nh\u01b0 th\u1ebf, n\u00ean gi\u1edd d\u1ebb gai v\u1eabn m\u1eafc k\u1eb9t \u1edf Trung \u00c2u. Bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu \u0111ang khi\u1ebfn ph\u01b0\u01a1ng b\u1eafc \u1ea5m h\u01a1n, v\u00ec th\u1ebf, trong t\u01b0\u01a1ng lai, c\u00f3 th\u1ec3 d\u1ebb gai s\u1ebd m\u1edf r\u1ed9ng ph\u1ea1m vi c\u1ee7a m\u00ecnh theo h\u01b0\u1edbng \u0111\u1ea5y. \u0110\u1ed3ng th\u1eddi, kh\u00ed h\u1eadu cu\u1ed1i c\u00f9ng s\u1ebd tr\u1edf n\u00ean qu\u00e1 n\u00f3ng \u1edf ph\u01b0\u01a1ng nam \u0111\u1ebfn n\u1ed7i m\u00e0 to\u00e0n b\u1ed9 ph\u1ea1m vi c\u1ee7a lo\u00e0i c\u00e2y n\u00e0y s\u1ebd d\u1eddi v\u1ec1 ph\u01b0\u01a1ng b\u1eafc.","\u20143\u26050\u2014 NH\u1eeeNG KH\u00c1CH H\u00c0NG KH\u00d3 NH\u1eb0N Th\u1ebf v\u00ec sao c\u00e2y l\u1ea1i s\u1ed1ng qu\u00e1 l\u00e2u nh\u01b0 v\u1eady? X\u00e9t cho c\u00f9ng, ch\u00fang v\u1ed1n c\u00f3 th\u1ec3 sinh tr\u01b0\u1edfng h\u1ec7t nh\u01b0 hoa d\u1ea1i: Ph\u00e1t tri\u1ec3n b\u00f9ng n\u1ed5 v\u00e0o m\u00f9a h\u00e8, n\u1edf hoa, k\u1ebft h\u1ea1t, r\u1ed3i h\u00f3a th\u00e0nh \u0111\u1ea5t m\u00f9n. \u0110i\u1ec1u \u0111\u00f3 mang \u0111\u1ebfn m\u1ed9t l\u1ee3i th\u1ebf r\u00f5 r\u00e0ng. M\u1ed7i th\u1ebf h\u1ec7 k\u1ebf ti\u1ebfp \u0111\u1ec1u mang trong m\u00ecnh c\u01a1 h\u1ed9i bi\u1ebfn \u0111\u1ed5i gen. Nh\u1eefng bi\u1ebfn \u0111\u1ed5i n\u00e0y h\u1ea7u h\u1ebft hay x\u1ea3y ra trong qu\u00e1 tr\u00ecnh giao ph\u1ed1i v\u00e0 th\u1ee5 tinh, v\u00e0 tr\u00ean th\u1ebf gi\u1edbi li\u00ean t\u1ee5c thay \u0111\u1ed5i n\u00e0y, c\u1ea7n ph\u1ea3i th\u00edch nghi th\u00ec m\u1edbi t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c. V\u00ed d\u1ee5, chu\u1ed9t t\u1ea1o ra th\u1ebf h\u1ec7 k\u1ebf ti\u1ebfp m\u1ed7i v\u00e0i tu\u1ea7n; ru\u1ed3i b\u00e2y gi\u1edd mau l\u1eb9 h\u01a1n tr\u01b0\u1edbc nhi\u1ec1u. M\u1ed7i khi c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n \u0111\u01b0\u1ee3c truy\u1ec1n l\u1ea1i, gen c\u00f3 th\u1ec3 b\u1ecb t\u1ed5n h\u1ea1i, v\u00e0 v\u1edbi v\u1eadn may b\u1ea5t ng\u1edd, t\u1ed5n h\u1ea1i n\u00e0y s\u1ebd kh\u1edfi \u0111\u1ea7u cho m\u1ed9t \u0111\u1eb7c t\u00ednh m\u1edbi \u0111\u1eb7c bi\u1ec7t c\u00f3 l\u1ee3i. T\u00f3m l\u1ea1i, \u0111\u00e2y l\u00e0 th\u1ee9 m\u00e0 ch\u00fang ta g\u1ecdi l\u00e0 ti\u1ebfn h\u00f3a. N\u00f3 gi\u00fap c\u00e1c sinh v\u1eadt th\u00edch nghi v\u1edbi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u0111ang thay \u0111\u1ed5i, do \u0111\u00f3, b\u1ea3o \u0111\u1ea3m s\u1ef1 s\u1ed1ng s\u00f3t c\u1ee7a m\u1ed7i lo\u00e0i. Kho\u1ea3ng ngh\u1ec9 tr\u01b0\u1edbc khi c\u00f3 th\u1ebf h\u1ec7 ti\u1ebfp theo c\u00e0ng ng\u1eafn, th\u00ec \u0111\u1ed9ng v\u1eadt v\u00e0 th\u1ef1c v\u1eadt l\u1ea1i c\u00e0ng c\u00f3 th\u1ec3 th\u00edch nghi nhanh h\u01a1n. C\u00e2y d\u01b0\u1eddng nh\u01b0 ho\u00e0n to\u00e0n ch\u1eb3ng quan t\u00e2m \u0111\u1ebfn \u0111i\u1ec1u b\u1eaft bu\u1ed9c v\u1ed1n \u0111\u00e3 t\u1ed3n t\u1ea1i t\u1eeb l\u00e2u m\u1ed9t c\u00e1ch khoa h\u1ecdc n\u00e0y. Ch\u00fang \u0111\u01a1n gi\u1ea3n s\u1ed1ng th\u1eadt l\u00e0 dai \u2013 trung b\u00ecnh h\u00e0ng tr\u0103m n\u0103m, th\u1eadm ch\u00ed th\u1ec9nh tho\u1ea3ng s\u1ed1ng \u0111\u1ebfn c\u1ea3 ng\u00e0n n\u0103m. D\u0129 nhi\u00ean, ch\u00fang s\u1ebd nh\u00e2n gi\u1ed1ng \u00edt nh\u1ea5t m\u1ed7i n\u0103m n\u0103m m\u1ed9t l\u1ea7n, nh\u01b0ng nh\u01b0 th\u1ebf th\u01b0\u1eddng kh\u00f4ng t\u1ea1o ra m\u1ed9t th\u1ebf h\u1ec7 c\u00e2y ho\u00e0n to\u00e0n m\u1edbi. C\u00f3 \u00edch l\u1ee3i g\u00ec khi m\u1ed9t c\u00e2y xanh t\u1ea1o ra h\u00e0ng tr\u0103m con ch\u00e1u nh\u01b0ng ch\u00fang l\u1ea1i ch\u1eb3ng ki\u1ebfm \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed tr\u1ed1ng n\u00e0o \u0111\u1ec3 th\u1ebf ch\u00e2n v\u00e0o? Ch\u1ec9 c\u1ea7n m\u1eb9 c\u1ee7a ch\u00fang v\u1eabn \u0111ang chi\u1ebfm tr\u1ecdn \u00e1nh s\u00e1ng, th\u00ec ch\u1eb3ng c\u00f3 bao nhi\u00eau chuy\u1ec7n c\u00f3 th\u1ec3 x\u1ea3y ra d\u01b0\u1edbi ch\u00e2n c\u00e2y m\u1eb9, nh\u01b0 t\u00f4i \u0111\u00e3 gi\u1ea3i th\u00edch \u1edf ph\u1ea7n tr\u01b0\u1edbc. Th\u1eadm","ch\u00ed n\u1ebfu m\u1ed9t c\u00e2y non ph\u00f4 b\u00e0y ra nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m m\u1edbi h\u1ebft s\u1ee9c xu\u1ea5t s\u1eafc, ch\u00fang th\u01b0\u1eddng ph\u1ea3i ch\u1edd c\u1ea3 h\u00e0ng th\u1ebf k\u1ef7 tr\u01b0\u1edbc khi c\u00f3 th\u1ec3 t\u1ef1 m\u00ecnh n\u1edf hoa v\u00e0 truy\u1ec1n l\u1ea1i nh\u1eefng gen n\u00e0y. R\u1ea5t \u0111\u01a1n gi\u1ea3n, t\u1ea5t c\u1ea3 m\u1ecdi th\u1ee9 \u0111\u1ec1u ti\u1ebfn t\u1eebng b\u01b0\u1edbc r\u1ea5t ch\u1eadm, v\u00e0 b\u1ea1n c\u00f3 l\u1ebd \u0111\u00e3 li\u1ec7u tr\u01b0\u1edbc \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y s\u1ebd \u0111\u1ea9y c\u00e2y v\u00e0o t\u00ecnh th\u1ebf c\u1ef1c k\u1ef3 gian nan. N\u1ebfu ch\u00fang ta nh\u00ecn l\u1ea1i l\u1ecbch s\u1eed kh\u00ed h\u1eadu g\u1ea7n \u0111\u00e2y s\u1ebd th\u1ea5y \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 nh\u1eefng bi\u1ebfn \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t. M\u1ed9t c\u00f4ng tr\u01b0\u1eddng x\u00e2y d\u1ef1ng l\u1edbn g\u1ea7n Zurich \u0111\u00e3 cho th\u1ea5y c\u00e1c bi\u1ebfn \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t \u0111\u1ebfn m\u1ee9c n\u00e0o. C\u00e1c c\u00f4ng nh\u00e2n \u1edf \u0111\u00f3 \u0111\u00e3 t\u00ecnh c\u1edd b\u1eaft g\u1eb7p nh\u1eefng g\u1ed1c c\u00e2y b\u1ecb ch\u1eb7t v\u1eabn c\u00f2n kh\u00e1 t\u01b0\u01a1i m\u1edbi, th\u1ee9 m\u00e0 tho\u1ea1t \u0111\u1ea7u h\u1ecd \u0111\u00e3 b\u1ecf qua m\u1ed9t b\u00ean kh\u00f4ng ch\u00fa \u00fd \u0111\u1ebfn. M\u1ed9t nh\u00e0 nghi\u00ean c\u1ee9u t\u00ecm th\u1ea5y ch\u00fang, l\u1ea5y m\u1eabu, v\u00e0 ki\u1ec3m tra tu\u1ed5i ch\u00fang. K\u1ebft qu\u1ea3: Nh\u1eefng g\u1ed1c c\u00e2y n\u00e0y v\u1ed1n l\u00e0 nh\u1eefng c\u00e2y th\u00f4ng m\u1ecdc \u1edf n\u01a1i \u0111\u00f3 g\u1ea7n m\u01b0\u1eddi b\u1ed1n ngh\u00ecn n\u0103m tr\u01b0\u1edbc. Tuy v\u1eady, th\u1ee9 c\u00f2n \u0111\u00e1ng ng\u1ea1c nhi\u00ean h\u01a1n n\u1eefa ch\u00ednh l\u00e0 s\u1ef1 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 v\u00e0o th\u1eddi \u0111i\u1ec3m \u1ea5y. Trong \u00edt h\u01a1n ba m\u01b0\u01a1i n\u0103m, nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m xu\u1ed1ng t\u1eadn 42 \u0111\u1ed9 Fahrenheit (5,55 \u0111\u1ed9 C), r\u1ed3i cu\u1ed1i c\u00f9ng l\u1ea1i t\u0103ng tr\u1edf l\u00ean b\u1eb1ng m\u1ee9c \u0111\u00f3. \u0110i\u1ec1u \u1ea5y ph\u00f9 h\u1ee3p v\u1edbi vi\u1ec5n c\u1ea3nh thay \u0111\u1ed5i kh\u00ed h\u1eadu hi\u1ec7n t\u1ea1i trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t m\u00e0 ch\u00fang ta c\u00f3 th\u1ec3 ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u00e0o cu\u1ed1i th\u1ebf k\u1ef7 hai m\u01b0\u01a1i m\u1ed1t. Th\u1eadm ch\u00ed th\u1ebf k\u1ef7 v\u1eeba qua \u1edf ch\u00e2u \u00c2u, v\u1edbi nh\u1eefng n\u0103m 1940 l\u1ea1nh bu\u1ed1t x\u01b0\u01a1ng, \u0111\u1ee3t h\u1ea1n k\u1ef7 l\u1ee5c v\u00e0o nh\u1eefng n\u0103m 1970, v\u00e0 nh\u1eefng n\u0103m 1990 qu\u00e1 m\u1ee9c \u1ea5m \u00e1p, c\u0169ng qu\u00e1 kh\u1eafc nghi\u1ec7t v\u1edbi thi\u00ean nhi\u00ean. C\u00e2y s\u1eed d\u1ee5ng hai chi\u1ebfn thu\u1eadt \u0111\u1ec3 nh\u1eabn n\u1ea1i ch\u1ecbu \u0111\u1ef1ng qua nh\u1eefng thay \u0111\u1ed5i n\u00e0y: T\u00ednh kh\u1ea3 bi\u1ebfn trong gen v\u00e0 h\u00e0nh vi. C\u00e2y t\u1ecf ra c\u00f3 s\u1ee9c ch\u1ecbu \u0111\u1ef1ng tuy\u1ec7t v\u1eddi tr\u01b0\u1edbc s\u1ef1 thay \u0111\u1ed5i kh\u00ed h\u1eadu. Th\u1ebf n\u00ean d\u1ebb gai b\u1ea3n \u0111\u1ecba ch\u00e2u \u00c2u m\u1edbi m\u1ecdc t\u1eeb Sicily \u0111\u1ebfn mi\u1ec1n nam Th\u1ee5y \u0110i\u1ec3n. Ngo\u1ea1i tr\u1eeb t\u00ean th\u1ee7 \u0111\u00f4 c\u00f3 ch\u1eef c\u00e1i S \u0111\u1ee9ng \u0111\u1ea7u ti\u00ean, nh\u1eefng v\u00f9ng n\u00e0y \u0111\u1ec1u c\u00f3 r\u1ea5t \u00edt \u0111i\u1ec3m chung v\u1edbi nhau. B\u1ea1ch d\u01b0\u01a1ng, th\u00f4ng, v\u00e0 s\u1ed3i c\u0169ng r\u1ea5t linh ho\u1ea1t. Nh\u01b0ng \u0111i\u1ec1u \u0111\u1ea5y v\u1eabn ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 ho\u00e0n th\u00e0nh tr\u1ecdn v\u1eb9n t\u1ea5t c\u1ea3 m\u1ecdi th\u1ee9 ch\u00fang c\u1ea7n l\u00e0m. Khi nhi\u1ec7t \u0111\u1ed9 v\u00e0 l\u01b0\u1ee3ng m\u01b0a thay \u0111\u1ed5i th\u1ea5t th\u01b0\u1eddng, nhi\u1ec1u lo\u00e0i \u0111\u1ed9ng v\u1eadt v\u00e0 n\u1ea5m s\u1ebd di chuy\u1ec3n t\u1eeb mi\u1ec1n nam l\u00ean mi\u1ec1n b\u1eafc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 c\u00e2y c\u0169ng c\u1ea7n c\u00f3 th\u1ec3 th\u00edch nghi v\u1edbi nh\u1eefng lo\u00e0i g\u00e2y h\u1ea1i m\u00e0 ch\u00fang kh\u00f4ng quen thu\u1ed9c.","Kh\u00ed h\u1eadu c\u00f3 th\u1ec3 thay \u0111\u1ed5i nghi\u00eam tr\u1ecdng \u0111\u1ebfn m\u1ee9c v\u01b0\u1ee3t ng\u01b0\u1ee1ng ch\u1ecbu \u0111\u1ef1ng c\u1ee7a c\u00e2y. V\u00ec ch\u00fang kh\u00f4ng c\u00f3 ch\u00e2n \u0111\u1ec3 ch\u1ea1y, c\u0169ng ch\u1eb3ng c\u00f3 n\u01a1i n\u00e0o \u0111\u1ec3 xin gi\u00fap \u0111\u1ee1, n\u00ean ch\u00fang ph\u1ea3i th\u00edch nghi \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ef1 gi\u1ea3i quy\u1ebft c\u1ea3nh ng\u1ed9 c\u1ee7a b\u1ea3n th\u00e2n. C\u01a1 h\u1ed9i \u0111\u1ea7u ti\u00ean \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y \u0111\u1ebfn v\u00e0o giai \u0111o\u1ea1n \u0111\u1ea7u \u0111\u1eddi s\u1edbm nh\u1ea5t. Ch\u1ec9 m\u1ed9t th\u1eddi gian ng\u1eafn sau khi th\u1ee5 tinh, khi h\u1ea1t \u0111ang h\u00ecnh th\u00e0nh b\u00ean trong hoa, ch\u00fang s\u1ebd ph\u1ea3n \u1ee9ng l\u1ea1i v\u1edbi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng. N\u1ebfu tr\u1eddi \u0111\u1eb7c bi\u1ec7t \u1ea5m v\u00e0 kh\u00f4, nh\u1eefng gen th\u00edch h\u1ee3p s\u1ebd \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n nh\u01b0 v\u1eady, nh\u1eefng m\u1ea7m non v\u00e2n sam c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng kh\u00ed h\u1eadu \u1ea5m \u00e1p t\u1ed1t h\u01a1n \u2013 m\u1eb7c d\u00f9 ch\u00fang l\u1ea1i th\u1ea5t b\u1ea1i trong vi\u1ec7c ch\u1ed1ng ch\u1ecbu s\u01b0\u01a1ng gi\u00e1 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p t\u01b0\u01a1ng t\u1ef1. Nh\u1eefng c\u00e2y tr\u01b0\u1edfng th\u00e0nh c\u0169ng c\u00f3 th\u1ec3 th\u00edch nghi. N\u1ebfu v\u00e2n sam s\u1ed1ng s\u00f3t qua th\u1eddi k\u1ef3 kh\u00f4 h\u1ea1n v\u1edbi r\u1ea5t \u00edt n\u01b0\u1edbc, ch\u00fang s\u1ebd ti\u1ebft ki\u1ec7m h\u01a1i \u1ea9m h\u01a1n trong t\u01b0\u01a1ng lai, v\u00e0 ch\u00fang s\u1ebd kh\u00f4ng h\u00fat s\u1ea1ch n\u01b0\u1edbc kh\u1ecfi \u0111\u1ea5t khi ch\u1ec9 m\u1edbi \u0111\u1ea7u h\u00e8. L\u00e1 phi\u1ebfn v\u00e0 l\u00e1 kim l\u00e0 nh\u1eefng c\u01a1 quan m\u00e0 h\u1ea7u h\u1ebft n\u01b0\u1edbc s\u1ebd m\u1ea5t \u0111i th\u00f4ng qua b\u1ed1c h\u01a1i. N\u1ebfu c\u00e2y ch\u00fa \u00fd th\u1ea5y n\u01b0\u1edbc \u0111ang thi\u1ebfu h\u1ee5t v\u00e0 kh\u00e1t \u0111ang tr\u1edf th\u00e0nh r\u1eafc r\u1ed1i d\u00e0i h\u1ea1n, n\u00f3 s\u1ebd m\u1eb7c v\u00e0o l\u1edbp \u00e1o kho\u00e1c d\u00e0y h\u01a1n. C\u00e2y s\u1ebd t\u0103ng t\u00ednh b\u1ec1n ch\u1eafc cho l\u1edbp s\u00e1p b\u1ea3o v\u1ec7 tr\u00ean b\u1ec1 m\u1eb7t l\u00e1. Th\u00e0nh t\u1ebf b\u00e0o trong l\u00e1 ng\u0103n n\u01b0\u1edbc kh\u00f4ng tho\u00e1t ra, v\u00e0 c\u00e2y t\u0103ng \u0111\u1ed9 d\u00e0y c\u1ee7a th\u00e0nh t\u1ebf b\u00e0o b\u1eb1ng c\u00e1ch b\u1ed5 sung th\u00eam c\u00e1c l\u1edbp ph\u1ee5. Tuy nhi\u00ean, v\u00ec c\u00e2y chu\u1ea9n b\u1ecb k\u1ef9 qu\u00e1, n\u00ean n\u00f3 c\u0169ng s\u1ebd g\u1eb7p v\u1ea5t v\u1ea3 trong vi\u1ec7c h\u00f4 h\u1ea5p. M\u1ed9t khi c\u00e2y \u0111\u00e3 d\u00f9ng h\u1ebft c\u00e1c \u201cchi\u00eau th\u1ee9c\u201d v\u1ec1 m\u1eb7t h\u00e0nh vi, n\u00f3 s\u1ebd quay sang d\u00f9ng c\u00e1c \u201cchi\u00eau th\u1ee9c\u201d v\u1ec1 m\u1eb7t di truy\u1ec1n h\u1ecdc. Nh\u01b0 t\u00f4i \u0111\u00e3 \u0111\u1ec1 c\u1eadp, m\u1ea5t m\u1ed9t th\u1eddi gian c\u1ef1c k\u1ef3 d\u00e0i \u0111\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c th\u1ebf h\u1ec7 m\u1edbi c\u1ee7a c\u00e2y. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 vi\u1ec7c th\u00edch nghi nhanh kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn, nh\u01b0ng nh\u1eefng ph\u1ea3n \u1ee9ng kh\u00e1c v\u1eabn c\u00f3 th\u1ec3 d\u00f9ng \u0111\u01b0\u1ee3c. Trong m\u1ed9t khu r\u1eebng \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u00f9y \u00fd th\u00edch, c\u1ea5u tr\u00fac gen \u1edf m\u1ed7i c\u00e2y ri\u00eang l\u1ebb thu\u1ed9c c\u00f9ng m\u1ed9t lo\u00e0i l\u00e0 r\u1ea5t kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y tr\u00e1i ng\u01b0\u1ee3c v\u1edbi con ng\u01b0\u1eddi: C\u00e1c c\u00e1 th\u1ec3 r\u1ea5t t\u01b0\u01a1ng t\u1ef1 nhau v\u1ec1 m\u1eb7t di truy\u1ec1n h\u1ecdc. Theo \u0111i\u1ec1u ki\u1ec7n ti\u1ebfn h\u00f3a, b\u1ea1n c\u00f3 th\u1ec3 n\u00f3i r\u1eb1ng t\u1ea5t c\u1ea3 ch\u00fang ta \u0111\u1ec1u c\u00f9ng m\u1ed9t h\u1ecd. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c c\u00e1 th\u1ec3 d\u1ebb gai ph\u00e1t tri\u1ec3n trong qu\u1ea7n th\u1ee5 g\u1ea7n n\u01a1i t\u00f4i s\u1ed1ng xa nhau v\u1ec1 m\u1eb7t di","truy\u1ec1n h\u1ecdc nh\u01b0 c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt kh\u00e1c bi\u1ec7t v\u1eady. \u0110i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 m\u1ed7i c\u00e2y \u0111\u1ec1u c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh kh\u00e1c nhau. M\u1ed9t s\u1ed1 c\u00e2y x\u1eed l\u00fd h\u1ea1n h\u00e1n t\u1ed1t h\u01a1n l\u1ea1nh gi\u00e1. S\u1ed1 kh\u00e1c th\u00ec c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 v\u1ec7 m\u1ea1nh m\u1ebd tr\u01b0\u1edbc c\u00f4n tr\u00f9ng. S\u1ed1 kh\u00e1c n\u1eefa th\u00ec \u0111\u1eb7c bi\u1ec7t ch\u1eb3ng h\u1ec1 h\u1ea5n g\u00ec d\u00f9 g\u1ed1c b\u1ecb ng\u1eadp n\u01b0\u1edbc. N\u1ebfu \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u1eadu thay \u0111\u1ed5i, nh\u1eefng c\u00e1 th\u1ec3 \u0111\u1ea7u ti\u00ean ch\u1ebft \u0111i s\u1ebd l\u00e0 nh\u1eefng c\u00e2y g\u1eb7p kh\u00f3 kh\u0103n nh\u1ea5t trong vi\u1ec7c \u0111\u1ed1i ph\u00f3 v\u1edbi hi\u1ec7n tr\u1ea1ng m\u1edbi. M\u1ed9t v\u00e0i c\u00e2y l\u1edbn tu\u1ed5i s\u1ebd ch\u1ebft, nh\u01b0ng h\u1ea7u h\u1ebft ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a khu r\u1eebng s\u1ebd v\u1eabn \u0111\u00fang nguy\u00ean \u0111\u1ea5y. N\u1ebfu \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng tr\u1edf n\u00ean kh\u1eafc nghi\u1ec7t h\u01a1n, th\u00ec th\u1eadm ch\u00ed to\u00e0n b\u1ed9 m\u1ed9t lo\u00e0i c\u00e2y c\u0169ng c\u00f3 th\u1ec3 b\u1ecb di\u1ec7t s\u1ea1ch, nh\u01b0ng \u0111\u1ea5y v\u1eabn ch\u1eb3ng ph\u1ea3i l\u00e0 ng\u00e0y t\u00e0n c\u1ee7a c\u1ea3 khu r\u1eebng. Th\u00f4ng th\u01b0\u1eddng v\u1eabn s\u00f3t l\u1ea1i m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e2y xanh v\u1eeba \u0111\u1ee7 \u0111\u1ec3 t\u1ea1o ra qu\u1ea3 v\u00e0 b\u00f3ng r\u00e2m cho th\u1ebf h\u1ec7 k\u1ebf ti\u1ebfp. T\u00f4i \u0111\u00e3 l\u00e0m m\u1ed9t ph\u00e9p t\u00ednh cho qu\u1ea7n th\u1ee5 d\u1ebb gai l\u1edbn tu\u1ed5i trong khu r\u1eebng t\u00f4i qu\u1ea3n l\u00fd, s\u1eed d\u1ee5ng nh\u1eefng d\u1eef li\u1ec7u khoa h\u1ecdc c\u00f3 s\u1eb5n. Th\u1eadm ch\u00ed n\u1ebfu th\u1ec9nh trong t\u01b0\u01a1ng lai, kh\u00ed h\u1eadu ki\u1ec3u T\u00e2y Ban Nha xu\u1ea5t hi\u1ec7n \u1edf \u0111\u00e2y, t\u1ea1i H\u00fcmmel n\u00e0y, th\u00ec v\u1eabn c\u00f3 m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng c\u00e2y r\u1ea5t l\u1edbn ch\u1ed1ng ch\u1ecdi \u0111\u01b0\u1ee3c. \u0110i\u1ec1u ki\u1ec7n duy nh\u1ea5t l\u00e0 k\u1ebft c\u1ea5u x\u00e3 h\u1ed9i trong khu r\u1eebng kh\u00f4ng b\u1ecb qu\u1ea5y nhi\u1ec5u b\u1edfi c\u00e1c ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c g\u1ed7 \u0111\u1ec3 khu r\u1eebng c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c t\u1ef1 \u0111i\u1ec1u ch\u1ec9nh vi kh\u00ed h\u1eadu c\u1ee7a ri\u00eang m\u00ecnh.","\u20143\u26051\u2014 TH\u1edcI \u0110\u1ea0I H\u1ed6N LO\u1ea0N Trong r\u1eebng, kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o m\u1ecdi vi\u1ec7c c\u0169ng di\u1ec5n ra theo \u0111\u00fang k\u1ebf ho\u1ea1ch. M\u1eb7c d\u00f9 h\u1ec7 sinh th\u00e1i n\u00e0y v\u00f4 c\u00f9ng \u1ed5n \u0111\u1ecbnh, th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng ro ro qua nhi\u1ec1u th\u1ebf k\u1ef7 m\u00e0 kh\u00f4ng c\u00f3 thay \u0111\u1ed5i m\u1ea1nh m\u1ebd b\u1ea5t ng\u1edd n\u00e0o, nh\u01b0ng m\u1ed9t th\u1ea3m h\u1ecda t\u1ef1 nhi\u00ean v\u1eabn c\u00f3 th\u1ec3 khi\u1ebfn m\u1ecdi th\u1ee9 l\u00e2m v\u00e0o c\u1ea3nh r\u1ed1i lo\u1ea1n. T\u00f4i \u0111\u00e3 vi\u1ebft v\u1ec1 nh\u1eefng c\u01a1n b\u00e3o m\u00f9a \u0111\u00f4ng. N\u1ebfu m\u1ed9t c\u01a1n l\u1ed1c xo\u00e1y san b\u1eb1ng to\u00e0n b\u1ed9 r\u1eebng, th\u00ec th\u01b0\u1eddng nh\u1eefng \u0111\u1ed3n \u0111i\u1ec1n tr\u1ed3ng v\u00e2n sam hay th\u00f4ng th\u01b0\u01a1ng m\u1ea1i s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng. Ch\u00fang th\u01b0\u1eddng sinh tr\u01b0\u1edfng \u1edf ch\u1ed7 \u0111\u1ea5t b\u1ecb t\u1ed5n h\u1ea1i do m\u00e1y m\u00f3c v\u00e0 b\u1ecb n\u00e9n qu\u00e1 ch\u1eb7t \u0111\u1ebfn m\u1ee9c r\u1ec5 c\u00e2y kh\u00f4ng th\u1ec3 ph\u00e1t tri\u1ec3n s\u00e2u xu\u1ed1ng \u0111\u1ec3 t\u1ea1o th\u00e0nh ch\u1ed7 d\u1ef1a v\u1eefng ch\u1eafc cho c\u00e2y. H\u01a1n n\u1eefa, \u1edf Trung \u00c2u, nh\u1eefng c\u00e2y n\u00e0y ph\u00e1t tri\u1ec3n cao h\u01a1n nhi\u1ec1u so v\u1edbi \u1edf qu\u00ea h\u01b0\u01a1ng ban \u0111\u1ea7u c\u1ee7a ch\u00fang t\u1ea1i mi\u1ec1n vi\u1ec5n b\u1eafc, v\u00e0 ch\u00fang gi\u1eef ch\u1eb7t l\u1ea5y nh\u1eefng chi\u1ebfc l\u00e1 kim c\u1ee7a m\u00ecnh th\u1eadm ch\u00ed khi \u0111\u00e3 v\u00e0o m\u00f9a \u0111\u00f4ng. \u0110i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 b\u1ec1 m\u1eb7t \u0111\u00f3n gi\u00f3 c\u1ee7a c\u00e2y s\u1ebd l\u1edbn, trong khi th\u00e2n c\u00e2y d\u00e0i s\u1ebd khi\u1ebfn \u00e1p l\u1ef1c l\u00ean c\u00e2y gia t\u0103ng. Do v\u1eady, vi\u1ec7c r\u1ec5 c\u00e2y y\u1ebfu kh\u00f4ng gi\u1eef c\u00e2y \u0111\u1ee9ng v\u1eefng ch\u1eb3ng ph\u1ea3i l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n th\u1ea3m kh\u1ed1c g\u00ec, v\u00ec th\u1eadt ra vi\u1ec7c \u1ea5y \u0111\u01a1n gi\u1ea3n ch\u1ec9 l\u00e0 h\u1ee3p logic th\u00f4i. Nh\u01b0ng c\u00f3 nh\u1eefng \u0111\u1ee3t b\u00e3o m\u00e0 th\u1eadm ch\u00ed nh\u1eefng khu r\u1eebng t\u1ef1 nhi\u00ean c\u0169ng \u00edt nh\u1ea5t ch\u1ecbu thi\u1ec7t h\u1ea1i c\u1ee5c b\u1ed9. Nh\u1eefng v\u00f2i r\u1ed3ng c\u00f3 l\u1ed1c xo\u00e1y s\u1ebd \u0111\u1ed5i h\u01b0\u1edbng ch\u1ec9 trong t\u00edch t\u1eafc v\u00e0 v\u00f9i l\u1ea5p lu\u00f4n c\u00e2y. Nh\u1eefng c\u01a1n cu\u1ed3ng phong n\u00e0y th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi c\u00e1c c\u01a1n d\u00f4ng th\u1ee9 m\u00e0 t\u1ea1i Trung \u00c2u h\u1ea7u nh\u01b0 ch\u1ec9 x\u1ea3y ra v\u00e0o m\u00f9a h\u00e8, v\u00ec v\u1eady v\u1eabn c\u00f2n nh\u00e2n t\u1ed1 t\u00e1c \u0111\u1ed9ng kh\u00e1c n\u1eefa: V\u00e0o th\u1eddi gian \u0111\u00f3 trong n\u0103m, c\u00e1c lo\u00e0i c\u00e2y r\u1ee5ng l\u00e1 v\u1eabn c\u00f2n l\u00e1 tr\u00ean c\u00e0nh. Trong nh\u1eefng th\u00e1ng m\u01b0a b\u00e3o \u201cth\u00f4ng th\u01b0\u1eddng\u201d t\u1eeb th\u00e1ng M\u01b0\u1eddi \u0111\u1ebfn th\u00e1ng Ba, c\u00e0nh c\u1ee7a \u201cD\u1ebb","gai & Nh\u1eefng ng\u01b0\u1eddi b\u1ea1n\u201d \u0111\u1ec1u ho\u00e0n to\u00e0n tr\u1ee5i l\u00e1, v\u00ec v\u1eady, ch\u00fang c\u1ea3n gi\u00f3 r\u1ea5t \u00edt. Tuy nhi\u00ean, v\u00e0o th\u00e1ng S\u00e1u ho\u1eb7c th\u00e1ng B\u1ea3y, c\u00e2y kh\u00f4ng mong \u0111\u1ee3i nh\u1eefng r\u1eafc r\u1ed1i ki\u1ec3u n\u00e0y s\u1ebd x\u1ea3y ra. N\u1ebfu v\u00f2i r\u1ed3ng qu\u00e9t ngang qua m\u1ed9t khu r\u1eebng, n\u00f3 s\u1ebd \u0111\u1eadp \u1ea7m \u1ea7m v\u00e0o t\u00e1n v\u00e0 xo\u1eafn \u0111\u1ee9t ch\u00fang ngay l\u1eadp t\u1ee9c v\u1edbi s\u1ee9c m\u1ea1nh hoang d\u1ea1i. Th\u00e2n c\u00e2y g\u00e3y v\u1ee5n \u0111\u01b0\u1ee3c \u0111\u1ec3 \u0111\u1ee9ng \u0111\u1ea5y nh\u01b0 m\u1ed9t \u0111\u00e0i t\u01b0\u1edfng ni\u1ec7m v\u1ee5 t\u1ea5n c\u00f4ng \u0111\u1ebfn t\u1eeb kh\u00ed quy\u1ec3n, m\u1ed9t minh ch\u1ee9ng h\u00f9ng h\u1ed3n cho s\u1ee9c m\u1ea1nh thi\u00ean nhi\u00ean. V\u00f2i r\u1ed3ng hi\u1ebfm khi x\u1ea3y ra, do \u0111\u00f3, theo \u0111i\u1ec1u ki\u1ec7n ti\u1ebfn h\u00f3a, vi\u1ec7c ph\u00e1t tri\u1ec3n chi\u1ebfn l\u01b0\u1ee3c ph\u00f2ng v\u1ec7 v\u00f2i r\u1ed3ng r\u00f5 r\u00e0ng l\u00e0 kh\u00f4ng h\u1ee3p l\u00fd. Tuy v\u1eady, c\u00f3 m\u1ed9t d\u1ea1ng t\u1ed5n h\u1ea1i x\u1ea3y ra th\u01b0\u1eddng xuy\u00ean h\u01a1n nhi\u1ec1u li\u00ean quan \u0111\u1ebfn c\u00e1c c\u01a1n d\u00f4ng: Vi\u1ec7c s\u1ee5p \u0111\u1ed5 ho\u00e0n to\u00e0n t\u00e1n c\u00e1c c\u00e2y r\u1ee5ng l\u00e1 do m\u01b0a l\u1edbn. Khi m\u1ed9t l\u01b0\u1ee3ng n\u01b0\u1edbc kh\u1ed5ng l\u1ed3 \u0111\u00e1p xu\u1ed1ng b\u1ec1 m\u1eb7t l\u00e1 ch\u1ec9 trong v\u00f2ng v\u00e0i ph\u00fat th\u00f4i, th\u00ec c\u00e2y \u0111\u00e3 ph\u1ea3i x\u1eed l\u00fd kh\u1ed1i l\u01b0\u1ee3ng n\u1eb7ng nhi\u1ec1u t\u1ea5n. Th\u01b0\u1eddng th\u00ec s\u1ee9c n\u1eb7ng t\u0103ng th\u00eam \u0111\u1ebfn t\u1eeb ph\u00eda tr\u00ean n\u00e0y s\u1ebd xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng tuy\u1ebft m\u00f9a \u0111\u00f4ng, v\u00e0 tuy\u1ebft s\u1ebd r\u01a1i xuy\u00ean qua c\u00e2y ngay v\u00ec l\u00e1 c\u00e2y l\u00fac \u1ea5y \u0111\u00e3 r\u1ee5ng h\u1ebft tr\u00ean m\u1eb7t \u0111\u1ea5t r\u1ed3i. V\u00e0o m\u00f9a h\u00e8, kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 tuy\u1ebft r\u01a1i, n\u00ean d\u1ebb gai v\u00e0 s\u1ed3i \u0111\u1ec1u \u0111\u1ea7y l\u00e1 tr\u00ean c\u00e0nh m\u00e0 kh\u00f4ng g\u1eb7p r\u1eafc r\u1ed1i n\u00e0o trong vi\u1ec7c ch\u1ecbu \u0111\u1ef1ng l\u01b0\u1ee3ng m\u01b0a th\u00f4ng th\u01b0\u1eddng. Th\u1eadm ch\u00ed m\u1ed9t c\u01a1n m\u01b0a to nh\u01b0 tr\u00fat c\u0169ng ch\u1eb3ng th\u00e0nh v\u1ea5n \u0111\u1ec1 n\u1ebfu c\u00e2y m\u1ecdc b\u00ecnh th\u01b0\u1eddng. Tuy nhi\u00ean, t\u00ecnh h\u00ecnh s\u1ebd tr\u1edf n\u00ean h\u01a1i nguy hi\u1ec3m \u0111\u1ed1i v\u1edbi c\u00e2y n\u1ebfu ch\u00fang \u0111\u00e3 ph\u1edbt l\u1edd \u201cs\u1ed5 tay quy \u01b0\u1edbc\u201d trong l\u00fac ph\u00e1t tri\u1ec3n khi\u1ebfn th\u00e2n v\u00e0 c\u00e0nh c\u1ee7a ch\u00fang gi\u1edd c\u00f3 v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u1ea5u tr\u00fac. M\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111i\u1ec3n h\u00ecnh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn g\u00e3y c\u00e0nh th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cch\u00f9m nguy hi\u1ec3m\u201d. C\u00e1i t\u00ean \u0111\u00e3 n\u00f3i l\u00ean t\u1ea5t c\u1ea3. M\u1ed9t c\u00e0nh c\u00e2y b\u00ecnh th\u01b0\u1eddng s\u1ebd cong nh\u01b0 m\u1ed9t c\u00e2y cung. N\u00f3 s\u1ebd m\u1ecdc ra t\u1eeb th\u00e2n, ph\u00e1t tri\u1ec3n h\u01b0\u1edbng l\u00ean trong m\u1ed9t th\u1eddi gian d\u00e0i, r\u1ed3i sau \u0111\u00f3 ph\u00e1t tri\u1ec3n theo chi\u1ec1u ngang tr\u01b0\u1edbc khi cong nh\u1eb9 xu\u1ed1ng. \u0110\u01b0\u1eddng cong thoai tho\u1ea3i n\u00e0y r\u1ea5t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c l\u00e0m nh\u1eb9 b\u1edbt t\u00e1c \u0111\u1ed9ng c\u1ee7a s\u1ee9c n\u1eb7ng t\u1eeb tr\u00ean cao \u0111\u1ed5 xu\u1ed1ng, gi\u00fap c\u00e0nh kh\u00f4ng b\u1ecb g\u00e3y. \u0110i\u1ec1u n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng, v\u00ec c\u00e0nh c\u1ee7a nh\u1eefng c\u00e2y c\u1ed5 th\u1ee5 c\u00f3 th\u1ec3 d\u00e0i \u0111\u1ebfn h\u01a1n 30 feet (9,144 m). Chi\u1ebfc \u0111\u00f2n b\u1ea9y d\u00e0i n\u00e0y g\u00e2y \u00e1p l\u1ef1c c\u1ef1c l\u1edbn l\u00ean \u0111i\u1ec3m m\u00e0 c\u00e0nh ti\u1ebfp x\u00fac v\u1edbi th\u00e2n. D\u00f9 c\u00f3 kh\u1ea3 n\u0103ng g\u1eb7p nguy","hi\u1ec3m, nh\u01b0ng nhi\u1ec1u c\u00e2y r\u00f5 r\u00e0ng kh\u00f4ng mu\u1ed1n l\u00e0m theo nh\u1eefng khu\u00f4n m\u1eabu \u0111\u00e3-th\u1eed-v\u00e0-ch\u1ee9ng nh\u1eadn-x\u00e0i-\u1ed5n. \u1ede nh\u1eefng c\u00e2y n\u00e0y, m\u1edbi \u0111\u1ea7u c\u00e0nh ch\u1ec9a th\u1eb3ng ra ngo\u00e0i th\u00e2n, ch\u1ec9 \u0111\u1ec3 sau \u0111\u00f3 u\u1ed1n cong, r\u1ed3i l\u1ea1i ph\u00e1t tri\u1ec3n h\u01b0\u1edbng l\u00ean tr\u00ean, v\u00e0 chi\u1ec1u h\u01b0\u1edbng nh\u01b0 th\u1ebf c\u1ee9 ti\u1ebfp di\u1ec5n. N\u1ebfu c\u00e0nh c\u00e2y m\u1ecdc th\u00e0nh h\u00ecnh d\u1ea1ng ch\u1eef J b\u1ecb u\u1ed1n cong xu\u1ed1ng \u0111\u1ea5t, l\u1ef1c t\u1eeb nh\u1eefng c\u01a1n m\u01b0a n\u1eb7ng h\u1ea1t s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5, v\u00e0 c\u00e0nh c\u00e2y s\u1ebd g\u00e3y v\u00ec \u00e1p l\u1ef1c h\u01b0\u1edbng xu\u1ed1ng s\u1ebd \u0111\u00e8 \u00e9p c\u00e1c th\u1edb g\u1ed7 \u1edf m\u1eb7t d\u01b0\u1edbi (\u0111\u00f3 s\u1ebd l\u00e0 c\u00e1c th\u1edb g\u1ed7 n\u1eb1m ph\u00eda ngo\u00e0i c\u1ee7a ch\u1ed7 cong h\u00ecnh ch\u1eef J) v\u00e0 k\u00e9o gi\u00e3n qu\u00e1 m\u1ee9c nh\u1eefng th\u1edb g\u1ed7 n\u1eb1m ph\u00eda trong. Th\u1ec9nh tho\u1ea3ng, ch\u00ednh th\u00e2n c\u00e2y c\u0169ng c\u00f3 h\u00ecnh th\u00f9 d\u1ecb d\u1ea1ng ki\u1ec3u nh\u01b0 v\u1eady, v\u00e0 nh\u1eefng c\u00e2y n\u00e0y s\u1ebd g\u00e3y r\u1eddi trong nh\u1eefng c\u01a1n m\u01b0a x\u1ed1i x\u1ea3 th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n c\u00f9ng nh\u1eefng c\u01a1n d\u00f4ng. \u0110\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t ti\u1ebfn tr\u00ecnh ch\u1ecdn l\u1ecdc kh\u1eafc nghi\u1ec7t nh\u1eb1m lo\u1ea1i b\u1ecf nh\u1eefng c\u00e2y kh\u00f4ng \u0111\u1ee7 n\u0103ng l\u1ef1c \u0111\u1ec3 ti\u1ebfp t\u1ee5c cu\u1ed9c \u0111ua. Nh\u1eefng th\u1eddi \u0111i\u1ec3m kh\u00e1c, vi\u1ec7c g\u00e3y \u0111\u1ed5 ch\u1eb3ng li\u00ean quan g\u00ec \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a c\u00e2y. \u00c1p l\u1ef1c t\u1eeb ph\u00eda tr\u00ean \u0111\u01a1n gi\u1ea3n l\u00e0 qu\u00e1 l\u1edbn. G\u00e3y \u0111\u1ed5 ki\u1ec3u nh\u01b0 v\u1eady h\u1ea7u h\u1ebft x\u1ea3y ra v\u00e0o th\u00e1ng Ba v\u00e0 th\u00e1ng T\u01b0, khi tuy\u1ebft chuy\u1ec3n t\u1eeb nh\u1eefng b\u00f4ng x\u1ed1p nh\u1eb9 t\u1ef1a l\u00f4ng h\u1ed3ng th\u00e0nh nh\u1eefng qu\u1ea3 t\u1ea1 n\u1eb7ng ch\u1ebft ng\u01b0\u1eddi. B\u1ea1n c\u00f3 th\u1ec3 \u01b0\u1edbc t\u00ednh th\u1eddi \u0111i\u1ec3m m\u00e0 tuy\u1ebft tr\u1edf n\u00ean nguy hi\u1ec3m b\u1eb1ng c\u00e1ch quan s\u00e1t c\u00e1c c\u1ee5m b\u00f4ng tuy\u1ebft khi ch\u00fang r\u01a1i xu\u1ed1ng. Khi c\u00e1c c\u1ee5m b\u00f4ng tuy\u1ebft c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng b\u1eb1ng \u0111\u1ed3ng xu hai Euro (xu n\u00e0y c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u1ed9t ph\u1ea7n t\u01b0 \u0111\u1ed3ng hai cent \u1edf M\u1ef9 hay Canada, ho\u1eb7c b\u1eb1ng \u0111\u1ed3ng m\u1ed9t \u0111\u00f4 \u00dac, ho\u1eb7c b\u1eb1ng \u0111\u1ed3ng m\u01b0\u1eddi pence c\u1ee7a Anh), t\u00ecnh h\u00ecnh \u0111ang tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng. Th\u1ee9 b\u1ea1n c\u00f3 trong giai \u0111o\u1ea1n n\u00e0y l\u00e0 tuy\u1ebft \u01b0\u1edbt \u2013 ch\u1ee9a r\u1ea5t nhi\u1ec1u n\u01b0\u1edbc v\u00e0 r\u1ea5t d\u00ednh. Thay v\u00ec r\u01a1i xuy\u00ean qua c\u00e1c c\u00e0nh c\u00e2y, tuy\u1ebft \u01b0\u1edbt l\u1ea1i d\u00ednh ch\u1eb7t v\u00e0o ch\u00fang, t\u00edch t\u1ee5 th\u00e0nh c\u00e1c l\u1edbp d\u00e0y v\u00e0 n\u1eb7ng. Tuy\u1ebft \u01b0\u1edbt r\u01a1i tr\u00ean m\u1ed9t c\u00e2y cao l\u1edbn, c\u1ee9ng ch\u1eafc c\u00f3 th\u1ec3 b\u1ebb g\u00e3y nhi\u1ec1u c\u00e0nh c\u00e2y to. \u1ede nh\u1eefng c\u00e2y \u0111ang tu\u1ed5i \u201cthanh ni\u00ean\u201d, t\u00ecnh h\u00ecnh th\u1eadm ch\u00ed c\u00f2n t\u1ec7 h\u01a1n. Ch\u00fang \u0111\u1ee9ng \u0111\u1ea5y v\u1edbi th\u00e2n c\u00e2y cao l\u00eau ngh\u00eau v\u00e0 t\u00e1n l\u00e1 b\u00e9 nh\u1ecf, ch\u1edd \u0111\u1ee3i \u0111\u1ebfn l\u01b0\u1ee3t m\u00ecnh \u0111\u01b0\u1ee3c l\u1edbn l\u00ean. Ch\u00fang ho\u1eb7c s\u1ebd g\u00e3y d\u01b0\u1edbi s\u1ee9c n\u1eb7ng c\u1ee7a tuy\u1ebft, ho\u1eb7c s\u1ebd b\u1ecb u\u1ed1n cong xu\u1ed1ng d\u01b0\u1edbi nhi\u1ec1u \u0111\u1ebfn n\u1ed7i kh\u00f4ng th\u1ec3 \u0111\u1ee9ng th\u1eb3ng l\u1ea1i \u0111\u01b0\u1ee3c n\u1eefa. Tuy nhi\u00ean, nh\u1eefng c\u00e2y nh\u1ecf th\u1eadt l\u00e0 nh\u1ecf th\u00ec l\u1ea1i kh\u00f4ng g\u1eb7p nguy hi\u1ec3m, v\u00ec th\u00e2n c\u00e2y b\u00e9 t\u00ed c\u1ee7a ch\u00fang \u0111\u01a1n gi\u1ea3n l\u00e0 qu\u00e1 ng\u1eafn. H\u00e3y t\u1eadp \u1ede","trung ch\u00fa \u00fd v\u00e0o l\u1ea7n t\u1edbi khi b\u1ea1n d\u1ea1o b\u01b0\u1edbc trong r\u1eebng. \u1ede \u0111\u00f3, gi\u1eefa nh\u1eefng c\u00e2y tu\u1ed5i \u201ctrung ni\u00ean\u201d, b\u1ea1n s\u1ebd th\u1ea5y m\u1ed9t s\u1ed1 c\u00e2y b\u1ecb u\u1ed1n cong kh\u00f4ng c\u00e1ch n\u00e0o h\u1ed3i ph\u1ee5c \u0111\u01b0\u1ee3c b\u1edfi hi\u1ec7n t\u01b0\u1ee3ng th\u1eddi ti\u1ebft tr\u00ean. S\u01b0\u01a1ng mu\u1ed1i t\u01b0\u01a1ng t\u1ef1 nh\u01b0 tuy\u1ebft, nh\u01b0ng l\u1ea1i l\u00e3ng m\u1ea1n h\u01a1n nhi\u1ec1u. \u00cdt nh\u1ea5t l\u00e0 ch\u00fang ta ngh\u0129 th\u1ebf, v\u00ec c\u1ecf c\u00e2y hoa l\u00e1 tr\u00f4ng nh\u01b0 th\u1ec3 \u0111\u01b0\u1ee3c r\u1eafc \u0111\u01b0\u1eddng v\u1eady. Khi nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 0 v\u00e0 t\u00ecnh tr\u1ea1ng s\u01b0\u01a1ng m\u00f9 x\u1ea3y ra c\u00f9ng l\u00fac, nh\u1eefng gi\u1ecdt h\u01a1i n\u01b0\u1edbc b\u00e9 x\u00edu l\u1eadp t\u1ee9c \u0111\u1ed9ng l\u1ea1i \u1edf b\u1ea5t c\u1ee9 ch\u1ed7 n\u00e0o m\u00e0 ch\u00fang ch\u1ea1m tr\u00fang tr\u00ean c\u00e0nh ho\u1eb7c tr\u00ean l\u00e1 kim. Sau v\u00e0i gi\u1edd, to\u00e0n b\u1ed9 khu r\u1eebng \u0111\u1ec1u tr\u1eafng x\u00f3a, m\u1eb7c d\u00f9 ch\u1eb3ng c\u00f3 l\u1ea5y m\u1ed9t b\u00f4ng tuy\u1ebft r\u01a1i xu\u1ed1ng. N\u1ebfu \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft c\u1ee9 li\u00ean t\u1ee5c nh\u01b0 th\u1ebf trong nhi\u1ec1u ng\u00e0y, h\u00e0ng tr\u0103m pound tinh th\u1ec3 b\u0103ng gi\u00e1 c\u00f3 th\u1ec3 t\u00edch t\u1ee5 tr\u00ean nh\u1eefng ng\u1ecdn c\u00e2y. Khi m\u1eb7t tr\u1eddi cu\u1ed1i c\u00f9ng xuy\u00ean th\u1ee7ng \u0111\u01b0\u1ee3c m\u1ed9t l\u1ed7 tr\u00ean m\u00e0n s\u01b0\u01a1ng, t\u1ea5t c\u1ea3 c\u00e2y xanh s\u1ebd l\u1ea5p l\u00e1nh c\u1ee9 nh\u01b0 trong truy\u1ec7n c\u1ed5 t\u00edch v\u1eady. Nh\u01b0ng th\u1eadt kh\u00f4ng may, \u0111\u00e2y l\u00e0 hi\u1ec7n th\u1ef1c, v\u00e0 c\u00e2y \u0111ang r\u00ean r\u1ec9 b\u00ean d\u01b0\u1edbi s\u1ee9c n\u1eb7ng c\u1ee7a l\u1edbp b\u0103ng v\u00e0 b\u1eaft \u0111\u1ea7u cong v\u1eb9o m\u1ed9t c\u00e1ch nguy hi\u1ec3m. Nh\u1eefng c\u00e2y c\u00f3 ch\u1ed7 y\u1ebfu trong ph\u1ea7n g\u1ed7 s\u1ebd g\u1eb7p chuy\u1ec7n ch\u1eb3ng l\u00e0nh. R\u1ed3i th\u00ec m\u1ed9t ti\u1ebfng \u201cr\u1eafc\u201d kh\u00f4 khan vang v\u1ecdng kh\u1eafp r\u1eebng nh\u01b0 ti\u1ebfng s\u00fang n\u1ed5, v\u00e0 c\u1ea3 t\u00e1n l\u00e1 s\u1ebd \u0111\u1ed5 nh\u00e0o xu\u1ed1ng. \u1ede Trung \u00c2u, s\u01b0\u01a1ng mu\u1ed1i x\u1ea3y ra trung b\u00ecnh m\u1ed7i m\u01b0\u1eddi n\u0103m, v\u00e0 \u0111i\u1ec1u \u1ea5y ngh\u0129a l\u00e0 c\u00e2y ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng vi\u1ec7c n\u00e0y \u0111\u1ebfn n\u0103m m\u01b0\u01a1i l\u1ea7n trong su\u1ed1t cu\u1ed9c \u0111\u1eddi. C\u00e2y c\u00e0ng \u00edt h\u00f2a nh\u1eadp v\u1edbi c\u1ed9ng \u0111\u1ed3ng c\u00e1c c\u00e2y chung lo\u00e0i ch\u1eebng n\u00e0o, th\u00ec c\u00e0ng g\u1eb7p nguy hi\u1ec3m nhi\u1ec1u ch\u1eebng \u1ea5y. Nh\u1eefng k\u1ebb c\u00f4 \u0111\u1ed9c ph\u1ea3i ch\u1ed1ng l\u1ea1i s\u01b0\u01a1ng l\u1ea1nh m\u00e0 ch\u1eb3ng \u0111\u01b0\u1ee3c ai b\u1ea3o v\u1ec7 r\u00f5 r\u00e0ng s\u1ebd th\u01b0\u1eddng xuy\u00ean ng\u00e3 qu\u1ef5 h\u01a1n so v\u1edbi nh\u1eefng c\u00e1 th\u1ec3 c\u00f3 m\u1ed1i quan h\u1ec7 t\u1ed1t trong m\u1ed9t khu r\u1eebng r\u1eadm \u2013 nh\u1eefng c\u00e2y n\u00e0y c\u00f3 th\u1ec3 t\u1ef1a v\u00e0o h\u00e0ng x\u00f3m \u0111\u1ec3 \u0111\u01b0\u1ee3c ch\u1ed1ng \u0111\u1ee1. H\u01a1n n\u1eefa, gi\u00f3 c\u00f3 khuynh h\u01b0\u1edbng th\u1ed5i qua nh\u1eefng t\u00e1n r\u1eebng r\u1eadm r\u1ea1p, v\u00ec v\u1eady h\u1ea7u nh\u01b0 ch\u1ec9 nh\u1eefng ng\u1ecdn tr\u00ean cao nh\u1ea5t m\u1edbi b\u1ecb c\u00e1c tinh th\u1ec3 b\u0103ng bao ph\u1ee7 nghi\u00eam tr\u1ecdng. Nh\u01b0ng th\u1eddi ti\u1ebft v\u1eabn c\u00f2n nhi\u1ec1u chi\u00eau tr\u00f2 \u1ea9n gi\u1ea5u kh\u00e1c. V\u00ed d\u1ee5 nh\u01b0 tia s\u00e9t. C\u00f3 m\u1ed9t c\u00e2u t\u1ee5c ng\u1eef c\u1ed5 c\u1ee7a \u0110\u1ee9c v\u1ec1 d\u00f4ng t\u1ed1 trong r\u1eebng nhu sau: \\\"Eichen sollst du weichen, Buchen sollst du suchen\\\", d\u1ecbch ra l\u00e0 \u201cTr\u00e1nh s\u1ed3i, t\u00ecm d\u1ebb gai\u201d. C\u00e2u t\u1ee5c ng\u1eef n\u00e0y b\u1eaft","\u1ecb g \u1ee5g y ngu\u1ed3n t\u1eeb vi\u1ec7c b\u1ea1n c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c tr\u00ean th\u00e2n c\u1ee7a m\u1ed9t s\u1ed1 c\u00e2y s\u1ed3i gi\u00e0 m\u1ed9t \u0111\u01b0\u1eddng n\u1ee9t r\u1ed9ng v\u00e0i inch k\u00e9o d\u00e0i xu\u1ed1ng d\u01b0\u1edbi: \u0110\u00e2y l\u00e0 n\u01a1i m\u00e0 s\u00e9t \u0111\u00e3 \u0111\u00e1nh v\u00e0o khi\u1ebfn v\u1ecf c\u00e2y to\u00e1c ra v\u00e0 n\u1ee9t s\u00e2u v\u00e0o c\u1ea3 ph\u1ea7n g\u1ed7. T\u00f4i ch\u01b0a bao gi\u1edd nh\u00ecn th\u1ea5y v\u1ebft s\u1eb9o n\u00e0o nh\u01b0 th\u1ebf tr\u00ean th\u00e2n c\u1ee7a d\u1ebb gai. Nh\u01b0ng k\u1ebft lu\u1eadn r\u1eb1ng s\u00e9t kh\u00f4ng bao gi\u1edd \u0111\u00e1nh tr\u00fang d\u1ebb gai th\u00ec m\u1ee9c \u0111\u1ed9 sai l\u1ea7m ch\u1eb3ng thua g\u00ec m\u1ee9c \u0111\u1ed9 nguy hi\u1ec3m c\u1ee7a s\u00e9t \u0111\u00e2u. Nh\u1eefng c\u00e2y d\u1ebb gai c\u1ed5 th\u1ee5 to l\u1edbn ch\u1eb3ng h\u1ec1 cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c tia s\u00e9t, v\u00ec ch\u00ednh ch\u00fang c\u0169ng b\u1ecb s\u00e9t \u0111\u00e1nh th\u01b0\u1eddng xuy\u00ean. Nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu khi\u1ebfn c\u00e2y d\u1ebb gai ch\u1eb3ng c\u00f3 d\u1ea5u hi\u1ec7u t\u1ed5n h\u1ea1i tr\u00ean th\u00e2n l\u00e0 v\u00ec v\u1ecf c\u1ee7a ch\u00fang qu\u00e1 tr\u01a1n nh\u1eb5n. Su\u1ed1t c\u01a1n d\u00f4ng, tr\u1eddi m\u01b0a, v\u00e0 n\u01b0\u1edbc \u0111\u1ed5 r\u00e0o r\u00e0o tr\u00ean b\u1ec1 m\u1eb7t nh\u1eb5n nh\u1ee5i c\u1ee7a v\u1ecf d\u1ebb gai s\u1ebd t\u1ea1o th\u00e0nh t\u1ea5m m\u00e0n n\u01b0\u1edbc li\u00ean mi\u00ean kh\u00f4ng d\u1ee9t. Khi s\u00e9t \u0111\u00e1nh tr\u00fang c\u00e2y, \u0111i\u1ec7n s\u1ebd di chuy\u1ec3n xu\u1ed1ng \u1edf ph\u00eda b\u00ean ngo\u00e0i c\u1ee7a t\u1ea5m m\u00e0n n\u01b0\u1edbc n\u00e0y, v\u00ec n\u01b0\u1edbc d\u1eabn \u0111i\u1ec7n t\u1ed1t h\u01a1n g\u1ed7 nhi\u1ec1u. Tuy nhi\u00ean, s\u1ed3i l\u1ea1i c\u00f3 v\u1ecf c\u00e2y s\u1ea7n s\u00f9i. N\u01b0\u1edbc m\u01b0a ch\u1ea1y d\u1ecdc th\u00e2n ch\u00fang s\u1ebd h\u00ecnh th\u00e0nh nh\u1eefng \u201cgh\u1ec1nh th\u00e1c\u201d v\u00e0 nh\u1ecf xu\u1ed1ng m\u1eb7t \u0111\u1ea5t d\u01b0\u1edbi d\u1ea1ng h\u00e0ng tr\u0103m th\u00e1c n\u01b0\u1edbc t\u00ed hon. Do \u0111\u00f3, d\u00f2ng \u0111i\u1ec7n do s\u00e9t \u0111\u00e1nh g\u00e2y ra s\u1ebd li\u00ean t\u1ee5c b\u1ecb ng\u1eaft qu\u00e3ng. Khi \u0111i\u1ec1u n\u00e0y x\u1ea3y ra, \u0111i\u1ec3m c\u00f3 s\u1ee9c ch\u1ecbu k\u00e9m nh\u1ea5t s\u1ebd l\u00e0 ph\u1ea7n g\u1ed7 \u01b0\u1edbt n\u1eb1m \u1edf v\u00f2ng sinh tr\u01b0\u1edfng ngo\u00e0i c\u00f9ng \u2013 ph\u1ea7n c\u00e2y s\u1eed d\u1ee5ng \u0111\u1ec3 v\u1eadn chuy\u1ec3n n\u01b0\u1edbc. \u0110\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi s\u1ed1 n\u0103ng l\u01b0\u1ee3ng \u201cd\u00e2ng tr\u00e0o\u201d do b\u1ecb s\u00e9t \u0111\u00e1nh, ph\u1ea7n d\u00e1c g\u1ed7 s\u1ebd n\u1ed5 tung nh\u01b0 th\u1ec3 b\u1ecb s\u00fang b\u1eafn tr\u00fang, v\u00e0 nhi\u1ec1u n\u0103m sau, v\u1ebft s\u1eb9o s\u1ebd l\u00e0 minh ch\u1ee9ng cho s\u1ef1 kh\u00f4ng may c\u1ee7a c\u00e2y s\u1ed3i. L\u00e3nh sam Douglas \u2013 lo\u00e0i b\u1ea3n \u0111\u1ecba \u1edf B\u1eafc M\u1ef9 nh\u01b0ng hi\u1ec7n gi\u1edd c\u0169ng m\u1ecdc \u1edf Trung \u00c2u, ph\u1ea3n \u1ee9ng c\u0169ng t\u01b0\u01a1ng t\u1ef1 s\u1ed3i, nh\u01b0ng \u1edf tr\u01b0\u1eddng h\u1ee3p c\u1ee7a ch\u00fang, b\u1ed9 r\u1ec5 d\u01b0\u1eddng nh\u01b0 si\u00eau nh\u1ea1y c\u1ea3m. Trong khu r\u1eebng t\u00f4i qu\u1ea3n l\u00fd, t\u00f4i \u0111\u00e3 quan s\u00e1t hai l\u1ea7n s\u00e9t \u0111\u00e1nh khi\u1ebfn kh\u00f4ng nh\u1eefng c\u00e2y b\u1ecb tr\u00fang s\u00e9t ch\u1ebft, m\u00e0 c\u00f2n khi\u1ebfn m\u01b0\u1eddi c\u00e2y l\u00e3nh sam Douglas kh\u00e1c n\u1eb1m trong b\u00e1n k\u00ednh 50 feet c\u1ee7a v\u1ee5 s\u00e9t \u0111\u00e1nh ch\u1ebft theo. R\u00f5 r\u00e0ng, nh\u1eefng c\u00e2y xung quanh c\u00f3 li\u00ean k\u1ebft v\u1edbi c\u00e2y n\u1ea1n nh\u00e2n trong l\u00f2ng \u0111\u1ea5t, v\u00e0 v\u00e0o ng\u00e0y h\u00f4m \u0111\u00f3, thay v\u00ec nh\u1eadn \u0111\u01b0\u1ee3c m\u00f3n \u0111\u01b0\u1eddng gi\u00fap duy tr\u00ec s\u1ef1 s\u1ed1ng, th\u00ec ch\u00fang l\u1ea1i nh\u1eadn \u0111\u01b0\u1ee3c \u201csu\u1ea5t \u0103n\u201d \u0111\u1ea7y \u0111i\u1ec7n ch\u1ebft ch\u00f3c.","C\u00f2n m\u1ed9t \u0111i\u1ec1u kh\u00e1c n\u1eefa c\u00f3 th\u1ec3 x\u1ea3y ra trong nh\u1eefng c\u01a1n d\u00f4ng \u0111\u1ea7y s\u1ea5m s\u00e9t \u2013 h\u1ecfa ho\u1ea1n. T\u00f4i t\u1eebng tr\u1ea3i qua \u0111i\u1ec1u \u0111\u00f3 m\u1ed9t l\u1ea7n l\u00fac gi\u1eefa \u0111\u00eam, khi nh\u1eefng chi\u1ebfc xe c\u1ee9u h\u1ecfa lao \u0111\u1ebfn khu r\u1eebng n\u01a1i c\u1ed9ng \u0111\u1ed3ng ch\u00fang t\u00f4i \u0111\u1ec3 d\u1eadp t\u1eaft m\u1ed9t \u0111\u00e1m ch\u00e1y nh\u1ecf. S\u00e9t \u0111\u00e3 \u0111\u00e1nh tr\u00fang m\u1ed9t c\u00e2y v\u00e2n sam gi\u00e0 r\u1ed7ng ru\u1ed9t. Ng\u1ecdn l\u1eeda b\u00ean trong c\u00e2y \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi c\u01a1n m\u01b0a nh\u01b0 tr\u00fat n\u01b0\u1edbc, r\u1ed3i lan d\u1ea7n l\u00ean ph\u1ea7n g\u1ed7 m\u1ee5c b\u00ean tr\u00ean. Ng\u1ecdn l\u1eeda \u0111\u01b0\u1ee3c d\u1eadp t\u1eaft nhanh ch\u00f3ng, nh\u01b0ng th\u1eadm ch\u00ed n\u1ebfu kh\u00f4ng c\u00f3 c\u1ee9u h\u1ecfa, th\u00ec c\u0169ng ch\u1eb3ng x\u1ea3y ra chuy\u1ec7n g\u00ec n\u1ed5i. Khu r\u1eebng xung quanh \u01b0\u1edbt s\u0169ng v\u00e0 ng\u1ecdn l\u1eeda s\u1ebd kh\u00f4ng \u0111\u1eddi n\u00e0o c\u00f3 th\u1ec3 lan \u0111\u1ebfn ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a qu\u1ea7n th\u1ee5. Thi\u00ean nhi\u00ean kh\u00f4ng tr\u00f4ng \u0111\u1ee3i h\u1ecfa ho\u1ea1n x\u1ea3y ra trong nh\u1eefng khu r\u1eebng Trung \u00c2u b\u1ea3n \u0111\u1ecba. Nh\u1eefng c\u00e2y r\u1ee5ng l\u00e1 \u0111\u00e3 t\u1eebng m\u1ed9t th\u1eddi th\u1ed1ng tr\u1ecb kh\u00f4ng b\u1eaft l\u1eeda v\u00ec g\u1ed7 c\u1ee7a ch\u00fang kh\u00f4ng ch\u1ee9a nh\u1ef1a hay tinh d\u1ea7u. K\u1ebft qu\u1ea3 l\u00e0 kh\u00f4ng c\u00e2y n\u00e0o ph\u00e1t tri\u1ec3n c\u00e1c c\u01a1 ch\u1ebf ph\u1ea3n \u1ee9ng v\u1edbi nhi\u1ec7t \u0111\u1ed9. S\u1ed3i b\u1ea7n \u1edf B\u1ed3 \u0110\u00e0o Nha v\u00e0 T\u00e2y Ban Nha l\u00e0 minh ch\u1ee9ng cho vi\u1ec7c c\u01a1 ch\u1ebf nh\u01b0 v\u1eady v\u1eabn t\u1ed3n t\u1ea1i. L\u1edbp v\u1ecf d\u00e0y c\u1ee7a s\u1ed3i b\u1ea7n b\u1ea3o v\u1ec7 ch\u00fang kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 do ch\u00e1y r\u1eebng ph\u00e1t ra v\u00e0 cho ph\u00e9p c\u00e1c ch\u1ed3i b\u00fap n\u1eb1m b\u00ean d\u01b0\u1edbi v\u1ecf b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n l\u1ea7n n\u1eefa sau khi ng\u1ecdn l\u1eeda \u0111\u00e3 qu\u00e9t qua. M\u1eb7c d\u00f9 v\u1eady, \u1edf c\u00e1c v\u00f9ng Trung \u00c2u, vi\u1ec7c \u0111\u1ed9c canh t\u1ea1i c\u00e1c \u0111\u1ed3n \u0111i\u1ec1n v\u00e2n sam v\u00e0 th\u00f4ng c\u00f3 th\u1ec3 khi\u1ebfn nh\u1eefng n\u01a1i n\u00e0y th\u00e0nh m\u1ed3i ngon cho l\u1eeda khi nh\u1eefng chi\u1ebfc l\u00e1 kim b\u1ecb c\u00e2y v\u1ea5t b\u1ecf kh\u00f4 qu\u1eaft l\u1ea1i v\u00e0o m\u00f9a h\u00e8. Nh\u01b0ng t\u1ea1i sao nh\u1eefng c\u00e2y ng\u00e0nh th\u00f4ng l\u1ea1i tr\u1eef nhi\u1ec1u v\u1eadt ch\u1ea5t b\u1eaft l\u1eeda trong v\u1ecf v\u00e0 l\u00e1 c\u1ee7a ch\u00fang \u0111\u1ebfn nh\u01b0 v\u1eady? N\u1ebfu h\u1ecfa ho\u1ea1n x\u1ea3y ra nh\u01b0 c\u01a1m b\u1eefa \u1edf khu v\u1ef1c b\u1ea3n \u0111\u1ecba c\u1ee7a ch\u00fang, th\u00ec ch\u1eb3ng ph\u1ea3i s\u1ebd t\u1ed1t h\u01a1n n\u1ebfu ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y cao \u01b0? M\u1ed9t c\u00e2y xanh nh\u01b0 v\u00e2n sam Th\u1ee5y \u0110i\u1ec3n \u0111\u00e3 h\u01a1n t\u00e1m ng\u00e0n tu\u1ed5i \u1edf Dalarna s\u1ebd kh\u00f4ng th\u1ec3 n\u00e0o s\u1ed1ng th\u1ecd kinh kh\u1ee7ng nh\u01b0 v\u1eady n\u1ebfu n\u00f3 c\u1ee9 ch\u00ecm trong bi\u1ec3n l\u1eeda m\u1ed7i hai tr\u0103m n\u0103m m\u1ed9t l\u1ea7n. T\u00f4i ngh\u0129 nh\u1eefng ng\u01b0\u1eddi c\u1ea9u th\u1ea3 \u2013 v\u00ed d\u1ee5 nh\u01b0 ng\u01b0\u1eddi kh\u00f4ng tr\u00f4ng ch\u1eebng ng\u1ecdn l\u1eeda tr\u1ea1i c\u1ee7a m\u00ecnh \u2013 ch\u00ednh l\u00e0 nh\u1eefng ng\u01b0\u1eddi ph\u1ea3i ch\u1ecbu tr\u00e1ch nhi\u1ec7m cho lo\u1ea1n h\u1ecfa ho\u1ea1n b\u00ean trong khu r\u1eebng \u0111\u00e3 h\u00e0ng ng\u00e0n n\u0103m tu\u1ed5i. S\u1ed1 l\u01b0\u1ee3ng nh\u1eefng v\u1ee5 s\u00e9t \u0111\u00e1nh th\u1eadt s\u1ef1 c\u00f3 th\u1ec3 nh\u00f3m l\u00ean nh\u1eefng \u0111\u00e1m ch\u1ea3y nh\u1ecf c\u1ee5c b\u1ed9 hi\u1ebfm \u0111\u1ebfn n\u1ed7i nh\u1eefng lo\u00e0i c\u00e2y ch\u00e2u \u00c2u kh\u00f4ng bao gi\u1edd th\u00edch nghi v\u1edbi ch\u00fang. H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn nguy\u00ean","nh\u00e2n h\u1ecfa ho\u1ea1n v\u00e0o l\u1ea7n t\u1edbi b\u1ea1n nghe tin t\u1ee9c v\u1ec1 m\u1ed9t v\u1ee5 ch\u00e1y r\u1eebng: H\u1ea7u h\u1ebft \u0111\u1ec1u l\u00e0 do h\u00e0nh \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi. \u1ede B\u1eafc M\u1ef9, c\u0169ng nh\u01b0 \u1edf ch\u00e2u \u00c2u, lo\u00e0i ng\u01b0\u1eddi \u0111\u00e3 c\u00f3 m\u1eb7t k\u1ec3 t\u1eeb cu\u1ed1i k\u1ef7 b\u0103ng h\u00e0, \u201cch\u1ec9nh s\u1eeda\u201d c\u00e1c th\u1ee9 v\u1edbi l\u1eeda. V\u00ec v\u1eady, ch\u1eafc h\u1eb3n l\u00e0 h\u1ea7u h\u1ebft c\u00e1c v\u1ee5 ch\u00e1y r\u1eebng tr\u00ean l\u1ee5c \u0111\u1ecba \u0111\u00f3 \u0111\u1ec1u do con ng\u01b0\u1eddi g\u00e2y ra \u2013 \u0111\u1ed1t r\u1eebng l\u00e0m r\u1eaby tr\u1ed3ng c\u00e1c lo\u1ea1i c\u00e2y l\u01b0\u01a1ng th\u1ef1c \u1edf \u0111\u00e2y, v\u00f4 t\u01b0 qu\u0103ng m\u1ed9t m\u1ea9u thu\u1ed1c l\u00e1 \u0111ang ch\u00e1y d\u1edf \u1edf kia. Nh\u01b0ng thi\u00ean nhi\u00ean c\u0169ng c\u00f3 vai tr\u00f2 c\u1ee7a m\u00ecnh. D\u00f9 \u0111\u1ec3 ph\u00e1t tri\u1ec3n t\u00f9y \u00fd th\u00ec nh\u1eefng khu r\u1eebng \u1edf B\u1eafc M\u1ef9 v\u1eabn ph\u1ea3i tr\u1ea3i qua chu k\u1ef3 h\u1ecfa ho\u1ea1n t\u1ef1 nhi\u00ean. \u1ede n\u01a1i kh\u00ed h\u1eadu v\u1ed1n \u1ea9m \u01b0\u1edbt v\u00e0 m\u00e1t m\u1ebb, s\u00e9t c\u00f3 \u0111\u00e1nh tr\u00fang th\u00ec c\u0169ng nhanh ch\u00f3ng \u201ct\u1ecbt ng\u00f2i\u201d \u1edf n\u1ec1n r\u1eebng \u1ea9m th\u1ea5p, n\u00ean ch\u00e1y r\u1eebng ch\u1ec9 c\u00f3 th\u1ec3 x\u1ea3y ra v\u00e0i tr\u0103m n\u0103m m\u1ed9t l\u1ea7n. \u1ede nh\u1eefng khu v\u1ef1c n\u01a1i l\u00e1 kim v\u00e0 nh\u00e1nh con tr\u00ean m\u1eb7t \u0111\u1ea5t th\u01b0\u1eddng b\u1ecb hong \u0111\u1ebfn kh\u00f4 qu\u1eaft l\u1ea1i, s\u00e9t c\u00f3 th\u1ec3 kh\u01a1i m\u00e0o h\u1ecfa ho\u1ea1n th\u01b0\u1eddng xuy\u00ean \u0111\u1ebfn m\u1ee9c m\u1ed7i v\u00e0i n\u0103m m\u1ed9t l\u1ea7n. Nh\u1eefng ng\u1ecdn l\u1eeda \u201cc\u00e0n qu\u00e9t\u201d qua c\u1ea3 khu r\u1eebng theo chu k\u1ef3 t\u1ef1 nhi\u00ean n\u00e0y th\u01b0\u1eddng ch\u1ec9 ch\u00e1y \u1edf s\u00e1t m\u1eb7t \u0111\u1ea5t, \u0111\u1ee7 n\u00f3ng \u0111\u1ec3 \u0111\u1ed1t tr\u1ee5i c\u00e1c b\u1ee5i c\u00e2y \u1edf t\u1ea7ng s\u00e1t m\u1eb7t r\u1eebng v\u00e0 ch\u1eeba l\u1ea1i nh\u1eefng c\u00e2y \u0111\u00e3 tr\u01b0\u1edfng th\u00e0nh v\u1eefng ch\u00e3i \u2013 tuy \u00e1m l\u1eeda \u0111en thui nh\u01b0ng v\u1eabn b\u00ecnh y\u00ean v\u00f4 s\u1ef1. Nh\u01b0ng ngay khi kh\u01a1i m\u00e0o cho \u0111\u00e1m ch\u00e1y, con ng\u01b0\u1eddi c\u0169ng v\u1ed9i v\u00e3 d\u1eadp t\u1eaft l\u1eeda. Tr\u00ean n\u1ec1n c\u1ee7a nh\u1eefng khu r\u1eebng kh\u00f4ng b\u1ecb chu k\u1ef3 h\u1ecfa ho\u1ea1n c\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p \u0111\u1ec1u \u0111\u1eb7n qu\u00e9t qua, l\u00e1 v\u00e0 c\u00e0nh d\u1ec5 th\u00e0nh m\u1ed3i l\u1eeda ch\u1ea5t th\u00e0nh h\u00e0ng \u0111\u1ed1ng, ch\u1ec9 ch\u1edd \u0111\u1ee3i m\u1ed9t tia l\u1eeda b\u00f9ng l\u00ean. Trong \u0111i\u1ec1u ki\u1ec7n nh\u01b0 v\u1eady, thay v\u00ec ch\u1ec9 ch\u00e1y \u1edf t\u1ea7ng r\u1eebng s\u00e1t m\u1eb7t \u0111\u1ea5t v\u00e0 d\u1ecdn s\u1ea1ch ch\u1ed7 n\u00e0y, ng\u1ecdn l\u1eeda nhanh ch\u00f3ng leo thang v\u00e0 lan l\u00ean v\u00f2m r\u1eebng. Khi c\u00e1c t\u00e1n l\u00e1 b\u1eaft ch\u00e1y, t\u00e0n l\u1eeda bay sang nh\u1eefng c\u00e2y b\u00ean c\u1ea1nh, v\u00e0 th\u1ebf l\u00e0 h\u1ecfa ho\u1ea1n lan r\u1ed9ng. \u0110\u00e1m ch\u00e1y s\u00e1t m\u1eb7t r\u1eebng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p gi\u1edd \u0111\u00e3 th\u00e0nh \u0111\u1ecba ng\u1ee5c l\u1eeda, \u0111\u1ec3 l\u1ea1i h\u00e0ng tr\u0103m m\u1eabu Anh c\u00e1c tri\u1ec1n d\u1ed1c ch\u00e1y \u0111en sau b\u01b0\u1edbc ch\u00e2n ch\u00fang. Nhi\u1ec1u c\u00e2y \u1edf B\u1eafc M\u1ef9 th\u00edch nghi \u0111\u01b0\u1ee3c v\u1edbi chu k\u1ef3 ch\u00e1y s\u00e1t m\u1eb7t r\u1eebng t\u1ef1 nhi\u00ean n\u00e0y. Th\u00f4ng Ponderosa c\u00f9ng c\u00e1c c\u00e2y g\u1ed7 \u0111\u1ecf kh\u1ed5ng l\u1ed3 \u0111\u00e3 ti\u1ebfn h\u00f3a ra l\u1edbp v\u1ecf d\u00e0y \u0111\u1ec3 b\u1ea3o v\u1ec7 t\u1ea7ng sinh g\u1ed7 nh\u1ea1y c\u1ea3m c\u1ee7a ch\u00fang. C\u00e1c qu\u1ea3 h\u00ecnh n\u00f3n c\u1ee7a th\u00f4ng Jack s\u1ebd b\u1eadt m\u1edf d\u01b0\u1edbi s\u1ee9c","n\u00f3ng nh\u1eb1m gi\u00fap h\u1ea1t c\u1ee7a ch\u00fang r\u01a1i xu\u1ed1ng n\u1ec1n r\u1eebng \u0111\u00e3 s\u1ea1ch c\u00e2y c\u1ecf v\u00e0 \u201ch\u1ea1 c\u00e1nh\u201d l\u00ean l\u1edbp tro m\u1ec1m m\u1ea1i \u2013 n\u01a1i ho\u00e0n h\u1ea3o \u0111\u1ec3 b\u1eaft \u0111\u1ea7u m\u1ed9t cu\u1ed9c s\u1ed1ng m\u1edbi. Tuy nhi\u00ean, \u0111\u1eb7c t\u00ednh c\u1ee7a c\u00e1c v\u1ee5 ch\u00e1y r\u1eebng \u1edf B\u1eafc M\u1ef9 \u0111\u00e3 thay \u0111\u1ed5i do t\u00ecnh h\u00ecnh h\u1ea1n h\u00e1n ng\u00e0y c\u00e0ng gia t\u0103ng m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean v\u00e0 do ho\u1ea1t \u0111\u1ed9ng ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y c\u1ee7a con ng\u01b0\u1eddi, v\u00ec v\u1eady nh\u1eefng khu r\u1eebng v\u1ed1n \u0111\u00e3 c\u00f3 th\u1ec3 s\u1ed1ng s\u00f3t, ho\u1eb7c th\u1eadm ch\u00ed ph\u00e1t tri\u1ec3n sum su\u00ea khi c\u00f3 ch\u00e1y r\u1eebng, gi\u1edd l\u1ea1i nguy kh\u1ed1n tr\u01b0\u1edbc s\u1ee9c m\u1ea1nh h\u1ee7y di\u1ec7t c\u1ee7a h\u1ecfa ho\u1ea1n. C\u00f2n m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng kh\u00e1c \u00edt nguy hi\u1ec3m h\u01a1n nh\u01b0ng l\u1ea1i g\u00e2y \u0111au \u0111\u1edbn h\u01a1n nhi\u1ec1u \u0111\u1ed1i v\u1edbi c\u00e2y xanh m\u00e0 th\u1eadm ch\u00ed ngay c\u1ea3 t\u00f4i m\u00e3i \u0111\u1ebfn t\u1eadn b\u00e2y gi\u1edd m\u1edbi bi\u1ebft \u0111\u01b0\u1ee3c. Ng\u00f4i nh\u00e0 th\u01b0\u1eddng tr\u1ef1c cho nh\u1eefng ng\u01b0\u1eddi qu\u1ea3n l\u00fd r\u1eebng m\u00e0 ch\u00fang t\u00f4i s\u1ed1ng n\u1eb1m tr\u00ean \u0111\u1ec9nh n\u00fai \u1edf \u0111\u1ed9 cao g\u1ea7n 1.600 feet (487,68 m) so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n. Nh\u1eefng d\u00f2ng su\u1ed1i \u1edf kh\u1eafp n\u01a1i \u2013 th\u1ee9 nh\u01b0 \u0111\u01b0\u1ee3c t\u1ea1c s\u00e2u v\u00e0o quang c\u1ea3nh n\u01a1i \u0111\u00e2y, ch\u1eb3ng g\u00e2y h\u1ea1i g\u00ec \u0111\u1ebfn khu r\u1eebng. C\u00f2n ho\u00e0n to\u00e0n tr\u00e1i ng\u01b0\u1ee3c n\u1eefa kia. Tuy nhi\u00ean, nh\u1eefng con s\u00f4ng l\u1edbn l\u1ea1i l\u00e0 chuy\u1ec7n ho\u00e0n to\u00e0n kh\u00e1c. Ch\u00fang th\u01b0\u1eddng ch\u1ea3y tr\u00e0n b\u1edd, do \u0111\u00f3, s\u1ebd c\u00f3 h\u1ec7 sinh th\u00e1i r\u1ea5t \u0111\u1eb7c th\u00f9 ph\u00e1t tri\u1ec3n \u1edf m\u1ed7i b\u00ean b\u1edd: c\u00e1c \u0111\u1ed3ng c\u1ecf r\u1eebng ven s\u00f4ng. Lo\u00e0i c\u00e2y n\u00e0o s\u1ebd sinh tr\u01b0\u1edfng \u1edf nh\u1eefng \u0111\u1ed3ng c\u1ecf n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ef1c n\u01b0\u1edbc d\u00e2ng v\u00e0 vi\u1ec7c n\u01b0\u1edbc d\u00e2ng c\u00f3 th\u01b0\u1eddng xuy\u00ean kh\u00f4ng. N\u1ebfu n\u01b0\u1edbc l\u0169 l\u00e0 nh\u1eefng d\u00f2ng ch\u1ea3y nhanh v\u00e0 k\u00e9o d\u00e0i nhi\u1ec1u th\u00e1ng trong n\u0103m, th\u00ec li\u1ec5u v\u00e0 d\u01b0\u01a1ng ph\u00f9 h\u1ee3p s\u1ed1ng \u1edf \u0111\u00f3. Ch\u00fang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng s\u0169ng n\u01b0\u1edbc trong th\u1eddi gian d\u00e0i. B\u1ea1n th\u01b0\u1eddng th\u1ea5y \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng nh\u01b0 v\u1eady g\u1ea7n ch\u1ed7 s\u00f4ng ng\u00f2i, v\u00e0 \u0111\u00e2y l\u00e0 n\u01a1i m\u00e0 c\u00e1c \u0111\u1ed3ng c\u1ecf \u0111\u1ea7y li\u1ec5u v\u00e0 d\u01b0\u01a1ng h\u00ecnh th\u00e0nh. Xa h\u01a1n v\u00e0 th\u01b0\u1eddng cao h\u01a1n v\u00e0i yard, l\u0169 x\u1ea3y ra \u00edt th\u01b0\u1eddng xuy\u00ean h\u01a1n, v\u00e0 khi c\u00f3 l\u0169 \u2013 v\u00e0o m\u00f9a xu\u00e2n sau khi tuy\u1ebft tan \u2013 th\u00ec b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y nh\u1eefng ao l\u1edbn ch\u1ee9a n\u01b0\u1edbc ch\u1ea3y ch\u1eadm. V\u00e0o th\u1eddi \u0111i\u1ec3m c\u00e2y r\u1ee5ng l\u00e1, h\u1ea7u h\u1ebft n\u01b0\u1edbc \u0111\u00e3 c\u1ea1n kh\u00f4, v\u00e0 trong \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng nh\u01b0 v\u1eady, s\u1ed3i v\u00e0 du c\u1ea3m th\u1ea5y tho\u1ea3i m\u00e1i nh\u1ea5t. Ng\u01b0\u1ee3c v\u1edbi nh\u1eefng khu v\u1ef1c n\u01a1i li\u1ec5u v\u00e0 d\u01b0\u01a1ng m\u1ecdc, nh\u1eefng c\u00e1nh \u0111\u1ed3ng c\u00e2y g\u1ed7 c\u1ee9ng r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi c\u00e1c \u0111\u1ee3t l\u0169 m\u00f9a h\u00e8. Trong nh\u1eefng c\u01a1n l\u0169 m\u00f9a h\u00e8, nh\u1eefng c\u00e2y to kh\u1ecfe n\u00e0y c\u00f3 th\u1ec3 s\u1ebd ch\u1ebft, v\u00ec r\u1ec5 c\u1ee7a ch\u00fang b\u1ecb ng\u1ea1t th\u1edf.","Tuy nhi\u00ean, v\u00e0o m\u1ed9t s\u1ed1 m\u00f9a \u0111\u00f4ng, s\u00f4ng th\u1ef1c s\u1ef1 l\u00e0m c\u00e2y \u0111au \u0111\u1edbn. Trong chuy\u1ebfn \u0111i xuy\u00ean qua \u0111\u1ed3ng c\u00e2y g\u1ed7 c\u1ee9ng \u1edf trung l\u01b0u s\u00f4ng Elbe, t\u00f4i ch\u00fa \u00fd th\u1ea5y nh\u1eefng m\u1ea3nh v\u1ecf c\u00e2y l\u1ecfng l\u1ebbo tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y. V\u1ecb tr\u00ed c\u1ee7a t\u1ea5t c\u1ea3 t\u1ed5n th\u01b0\u01a1ng \u0111\u1ec1u c\u00f9ng m\u1ed9t \u0111\u1ed9 cao tr\u00ean c\u00e1c th\u00e2n c\u00e2y: Kho\u1ea3ng 6 feet (1,8288 m) so v\u1edbi m\u1eb7t \u0111\u1ea5t. T\u00f4i ch\u01b0a bao gi\u1edd nh\u00ecn th\u1ea5y th\u1ee9 nh\u01b0 th\u1ebf n\u00e0y, v\u00e0 t\u00f4i kh\u00f4ng th\u1ec3 t\u00ecm ra nguy\u00ean nh\u00e2n g\u00e2y ra t\u1ed5n th\u01b0\u01a1ng tr\u00ean. Nh\u1eefng ng\u01b0\u1eddi kh\u00e1c \u0111i c\u00f9ng chuy\u1ebfn \u0111\u00f3 c\u0169ng hoang mang y nh\u01b0 t\u00f4i v\u1eady, cho \u0111\u1ebfn khi nh\u00e2n vi\u00ean c\u1ee7a khu b\u1ea3o v\u1ec7 sinh quy\u1ec3n gi\u1ea3i \u0111\u00e1p c\u00e2u \u0111\u1ed1 tr\u00ean: T\u1ed5n th\u01b0\u01a1ng do b\u0103ng gi\u00e1 g\u00e2y ra. Khi s\u00f4ng Elbe \u0111\u00f3ng b\u0103ng v\u00e0o nh\u1eefng m\u00f9a \u0111\u00f4ng \u0111\u1eb7c bi\u1ec7t l\u1ea1nh, nh\u1eefng m\u1ea3ng b\u0103ng tr\u00f4i to d\u00e0y \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh. Khi kh\u00f4ng kh\u00ed v\u00e0 n\u01b0\u1edbc \u1ea5m l\u00ean v\u00e0o m\u00f9a xu\u00e2n, nh\u1eefng m\u1ea3ng b\u0103ng tr\u00f4i gi\u1eefa nh\u1eefng c\u00e2y s\u1ed3i v\u00e0 c\u00e2y du theo d\u00f2ng n\u01b0\u1edbc l\u0169, \u0111\u00e2m s\u1ea7m v\u00e0o nh\u1eefng th\u00e2n c\u00e2y. V\u00ec m\u1ef1c n\u01b0\u1edbc \u1edf kh\u1eafp n\u01a1i tr\u00ean \u0111\u1ed3ng c\u1ecf \u0111\u1ec1u cao nh\u01b0 nhau, n\u00ean v\u1ebft th\u01b0\u01a1ng s\u1ebd \u1edf c\u00f9ng m\u1ed9t \u0111\u1ed9 cao tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y. Trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, m\u1ed9t ng\u00e0y kia chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c m\u1ea3ng b\u0103ng tr\u00f4i tr\u00ean s\u00f4ng Elbe s\u1ebd ch\u1ec9 c\u00f2n l\u00e0 qu\u00e1 kh\u1ee9. Nh\u01b0ng v\u1ebft s\u1eb9o tr\u00ean nh\u1eefng c\u00e2y l\u1edbn tu\u1ed5i \u2013 \u00edt nh\u1ea5t l\u00e0 nh\u1eefng c\u00e2y \u0111\u00e3 t\u1eebng tr\u1ea3i qua m\u1ecdi ki\u1ec3u kh\u00ed h\u1eadu th\u1ea5t th\u01b0\u1eddng k\u1ec3 t\u1eeb \u0111\u1ea7u th\u1ebf k\u1ef7 hai m\u01b0\u01a1i \u2013 s\u1ebd l\u00e0 minh ch\u1ee9ng cho s\u1ef1 vi\u1ec7c \u0111\u00e3 t\u1eebng x\u1ea3y ra trong qu\u00e1 kh\u1ee9.","\u20143\u26052\u2014 D\u00c2N NH\u1eacP C\u01af V\u00ec c\u00e2y di c\u01b0, n\u00ean r\u1eebng li\u00ean t\u1ee5c thay \u0111\u1ed5i. Kh\u00f4ng ch\u1ec9 r\u1eebng \u2013 c\u1ea3 thi\u00ean nhi\u00ean c\u0169ng thay \u0111\u1ed5i. \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao nhi\u1ec1u n\u1ed7 l\u1ef1c c\u1ee7a con ng\u01b0\u1eddi trong vi\u1ec7c b\u1ea3o t\u1ed3n nh\u1eefng c\u1ea3nh quan \u0111\u1eb7c th\u00f9 l\u1ea1i th\u1ea5t b\u1ea1i. Th\u1ee9 m\u00e0 ch\u00fang ta th\u1ea5y lu\u00f4n l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft ng\u1eafn g\u1ecdn v\u1ec1 m\u1ed9t v\u00f9ng \u0111\u1ea5t \u2013 d\u01b0\u1eddng nh\u01b0 ch\u1ec9 \u0111\u1ee9ng im t\u1ea1i ch\u1ed7. \u1ea2o gi\u00e1c \u0111\u1ea5y g\u1ea7n nh\u01b0 ho\u00e0n h\u1ea3o n\u01a1i r\u1eebng r\u1eadm, v\u00ec c\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng sinh v\u1eadt di chuy\u1ec3n ch\u1eadm nh\u1ea5t m\u00e0 ch\u00fang ta chia s\u1ebb th\u1ebf gi\u1edbi c\u00f9ng, v\u00e0 nh\u1eefng thay \u0111\u1ed5i trong r\u1eebng r\u1eadm t\u1ef1 nhi\u00ean ch\u1ec9 c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c sau nhi\u1ec1u th\u1ebf h\u1ec7 lo\u00e0i ng\u01b0\u1eddi. M\u1ed9t trong nh\u1eefng thay \u0111\u1ed5i n\u00e0y l\u00e0 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a nh\u1eefng lo\u00e0i m\u1edbi. Nh\u1edd c\u00e1c m\u00f3n l\u01b0u ni\u1ec7m d\u1ea1ng th\u1ef1c v\u1eadt m\u00e0 nh\u1eefng ng\u01b0\u1eddi s\u0103n c\u00e2y c\u1ea3nh ng\u00e0y tr\u01b0\u1edbc \u0111\u00e3 mang v\u1ec1 qu\u00ea h\u01b0\u01a1ng h\u1ecd, c\u00f9ng nh\u1eefng lo\u00e0i c\u00e2y m\u1edbi \u0111\u01b0\u1ee3c ng\u00e0nh l\u00e2m nghi\u1ec7p nh\u1eadp v\u1ec1 g\u1ea7n \u0111\u00e2y, m\u00e0 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c lo\u00e0i c\u00e2y \u2013 nh\u1eefng lo\u00e0i v\u1ed1n s\u1ebd ch\u1eb3ng bao gi\u1edd t\u1ef1 m\u00ecnh t\u00ecm \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng \u0111\u1ebfn ch\u00e2u \u00c2u, \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn n\u01a1i n\u00e0y. Nh\u1eefng c\u00e1i t\u00ean nh\u01b0 l\u00e3nh sam Douglas, th\u00f4ng r\u1ee5ng l\u00e1 Nh\u1eadt B\u1ea3n, v\u00e0 l\u00e3nh sam l\u1edbn kh\u00f4ng xu\u1ea5t hi\u1ec7n trong nh\u1eefng b\u00e0i d\u00e2n ca hay nh\u1eefng b\u00e0i th\u01a1 \u1edf ch\u00e2u \u00c2u v\u00ec ch\u00fang v\u1eabn ch\u01b0a tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n c\u1ed1 h\u1eefu trong k\u00fd \u1ee9c chung c\u1ee7a ng\u01b0\u1eddi d\u00e2n n\u01a1i n\u00e0y. Qu\u00e1 tr\u00ecnh di c\u01b0 c\u1ee7a c\u00e2y c\u0169ng di\u1ec5n ra theo chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i. Nh\u1eefng c\u00e2y m\u1edbi \u0111\u1ebfn ch\u00e2u \u00c2u th\u00ec d\u1ea7n c\u00f3 t\u1ea7m \u1ea3nh h\u01b0\u1edfng quan tr\u1ecdng, trong khi nh\u1eefng c\u00e2y ra \u0111i t\u00ecm cu\u1ed9c s\u1ed1ng m\u1edbi l\u1ea1i mang theo k\u00fd \u1ee9c n\u01a1i qu\u00ea nh\u00e0 trong h\u00e0nh l\u00fd c\u1ee7a ch\u00fang.","C\u00e1c c\u00e2y \u201cnh\u1eadp c\u01b0\u201d c\u00f3 \u0111\u1ecba v\u1ecb \u0111\u1eb7c bi\u1ec7t trong r\u1eebng. Ng\u01b0\u1ee3c l\u1ea1i v\u1edbi nh\u1eefng lo\u00e0i c\u00e2y di c\u01b0 t\u1ef1 nhi\u00ean, nh\u1eefng k\u1ebb nh\u1eadp c\u01b0 n\u00e0y \u0111\u1ebfn m\u00e0 kh\u00f4ng \u0111em theo h\u1ec7 sinh th\u00e1i \u0111\u1eb7c th\u00f9 c\u1ee7a m\u00ecnh. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, ch\u1ec9 m\u1ed7i h\u1ea1t gi\u1ed1ng c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c nh\u1eadp kh\u1ea9u, c\u00f3 ngh\u0129a l\u00e0 h\u1ea7u h\u1ebft n\u1ea5m c\u00f9ng c\u00e1c lo\u00e0i c\u00f4n tr\u00f9ng \u0111\u1ec1u \u1edf l\u1ea1i qu\u00ea nh\u00e0 c\u1ee7a ch\u00fang. \u201cL\u00e3nh sam Douglas & Nh\u1eefng ng\u01b0\u1eddi b\u1ea1n\u201d c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t kh\u1edfi \u0111\u1ea7u ho\u00e0n to\u00e0n m\u1edbi \u1edf ch\u00e2u \u00c2u. \u0110i\u1ec1u \u0111\u00f3 ch\u1eafc ch\u1eafn \u0111em l\u1ea1i l\u1ee3i th\u1ebf cho c\u00e2y. C\u00e2y ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 b\u1ec7nh t\u1eadt do kh\u00f4ng c\u00f3 nh\u1eefng lo\u00e0i g\u00e2y h\u1ea1i \u2013 \u00edt nh\u1ea5t l\u00e0 v\u1eady trong v\u00e0i th\u1eadp k\u1ef7 \u0111\u1ea7u. Con ng\u01b0\u1eddi c\u0169ng c\u00f3 tr\u1ea3i nghi\u1ec7m t\u01b0\u01a1ng t\u1ef1 t\u1ea1i Nam c\u1ef1c. Kh\u00f4ng kh\u00ed \u1edf \u0111\u1ea5y g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 m\u1ea7m b\u1ec7nh hay b\u1ee5i b\u1eb7m \u2013 n\u01a1i \u1edf r\u1ea5t l\u00fd t\u01b0\u1edfng cho nh\u1eefng ng\u01b0\u1eddi b\u1ecb b\u1ec7nh d\u1ecb \u1ee9ng n\u1ebfu nh\u01b0 l\u1ee5c \u0111\u1ecba n\u00e0y kh\u00f4ng qu\u00e1 bi\u1ec7t l\u1eadp. Khi c\u00e2y xanh l\u00e0m m\u1ed9t c\u00fa nh\u1ea3y xa \u0111\u1ebfn t\u1eadn m\u1ed9t l\u1ee5c \u0111\u1ecba m\u1edbi d\u01b0\u1edbi s\u1ef1 gi\u00fap \u0111\u1ee1 c\u1ee7a ch\u00fang ta, th\u00ec \u0111\u1ed1i v\u1edbi c\u00e2y, \u0111\u1ea5y gi\u1ed1ng nh\u01b0 ch\u00fang \u0111\u01b0\u1ee3c h\u00edt m\u1ed9t h\u01a1i d\u00e0i kh\u00f4ng kh\u00ed trong l\u00e0nh v\u00e0o ng\u1ef1c v\u1eady. Nh\u1eefng c\u00e2y may m\u1eafn s\u1ebd t\u00ecm \u0111\u01b0\u1ee3c \u0111\u1ed1i t\u00e1c n\u1ea5m cho r\u1ec5 c\u1ee7a ch\u00fang trong s\u1ed1 nh\u1eefng lo\u00e0i n\u1ea5m v\u1ed1n tr\u01b0\u1edbc \u0111\u00e2y ch\u01b0a t\u1eebng h\u1ee3p t\u00e1c chuy\u00ean m\u00f4n v\u1edbi ch\u00fang. Kh\u1ecfe m\u1ea1nh r\u1ea1ng r\u1ee1, nh\u1eefng k\u1ebb m\u1edbi \u0111\u1ebfn n\u00e0y ph\u00e1t tri\u1ec3n nh\u1eefng th\u00e2n c\u00e2y \u0111\u1ed3 s\u1ed9 trong nh\u1eefng khu r\u1eebng ch\u00e2u \u00c2u, v\u00e0 ch\u00fang l\u00e0m \u0111\u01b0\u1ee3c th\u1ebf ch\u1ec9 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian r\u1ea5t ng\u1eafn. Ch\u1eb3ng ng\u1ea1c nhi\u00ean khi ch\u00fang d\u01b0\u1eddng nh\u01b0 s\u1ed1ng kh\u00e1 kh\u1ea9m h\u01a1n so v\u1edbi nh\u1eefng lo\u00e0i b\u1ea3n \u0111\u1ecba \u2013 \u00edt nh\u1ea5t l\u00e0 \u1edf m\u1ed9t s\u1ed1 \u0111\u1ecba \u0111i\u1ec3m. C\u00e2y t\u1ef1 di c\u01b0 m\u1ed9t m\u00ecnh ch\u1ec9 c\u00f3 th\u1ec3 \u1ed5n \u0111\u1ecbnh cu\u1ed9c s\u1ed1ng \u1edf n\u01a1i m\u00e0 ch\u00fang ho\u00e0n to\u00e0n c\u1ea3m th\u1ea5y nh\u01b0 \u0111ang \u1edf nh\u00e0. Kh\u00f4ng nh\u1eefng kh\u00ed h\u1eadu m\u00e0 c\u1ea3 lo\u1ea1i \u0111\u1ea5t v\u00e0 \u0111\u1ed9 \u1ea9m c\u0169ng ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi l\u1ed1i s\u1ed1ng c\u1ee7a ch\u00fang n\u1ebfu ch\u00fang mu\u1ed1n l\u1ea5n \u00e1t s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a nh\u1eefng c\u00e2y c\u1ed5 th\u1ee5 v\u1ed1n \u0111\u00e3 ng\u1ef1 tr\u1ecb khu r\u1eebng b\u1ea5y l\u00e2u. \u0110\u1ed1i v\u1edbi nh\u1eefng c\u00e2y m\u00e0 lo\u00e0i ng\u01b0\u1eddi ch\u00fang ta \u0111em \u0111\u1ebfn khu r\u1eebng, k\u1ebft qu\u1ea3 d\u00e0i h\u1ea1n kh\u00e1 gi\u1ed1ng nh\u01b0 tr\u00f2 roulette\u273d. B\u1ea1n kh\u00f4ng bao gi\u1edd bi\u1ebft ch\u00ednh x\u00e1c \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra. V\u00ed d\u1ee5, anh \u0111\u00e0o \u0111en l\u00e0 lo\u00e0i c\u00e2y r\u1ee5ng l\u00e1 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb B\u1eafc M\u1ef9, ch\u00fang c\u00f3 th\u00e2n \u0111\u1eb9p tuy\u1ec7t v\u1eddi v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 t\u1ed1t khi m\u1ecdc \u1edf \u0111\u00f3. Ch\u1eb3ng ng\u1ea1c nhi\u00ean khi nh\u1eefng ng\u01b0\u1eddi ki\u1ec3m l\u00e2m \u1edf ch\u00e2u \u00c2u l\u1ea1i mu\u1ed1n c\u00f3 lo\u00e0i c\u00e2y n\u00e0y trong khu r\u1eebng c\u1ee7a h\u1ecd. Nh\u01b0ng sau v\u00e0i th\u1eadp k\u1ef7, h\u1ecd b\u1eaft \u0111\u1ea7u v\u1ee1 m\u1ed9ng. \u1ede v\u00f9ng \u0111\u1ea5t m\u1edbi, nh\u1eefng c\u00e2y n\u00e0y","m\u1ecdc cong v\u1eb9o, l\u1ec7ch l\u1ea1c, hi\u1ebfm khi cao h\u01a1n 65 feet (19,812 m), v\u00e0 ch\u00fang h\u1ea7u nh\u01b0 kh\u00f4ng h\u1ec1 m\u1ecdc b\u00ean d\u01b0\u1edbi nh\u1eefng c\u00e2y th\u00f4ng \u1edf khu v\u1ef1c \u0111\u00f4ng v\u00e0 b\u1eafc \u0110\u1ee9c. Th\u1ebf l\u00e0 nh\u1eefng c\u00e2y n\u00e0y b\u1ecb \u201cth\u1ea5t s\u1ee7ng\u201d, nh\u01b0ng \u0111\u1ebfn gi\u1edd th\u00ec ng\u01b0\u1eddi ta kh\u00f4ng th\u1ec3 lo\u1ea1i b\u1ecf ch\u00fang \u0111\u01b0\u1ee3c n\u1eefa. L\u0169 h\u01b0\u01a1u \u201ch\u1eaft h\u1ee7i\u201d nh\u1eefng c\u00e0nh anh \u0111\u00e0o \u0111en \u0111\u1eafng ngh\u00e9t, ch\u00fang th\u00edch g\u1eb7m d\u1ebb gai v\u00e0 s\u1ed3i h\u01a1n, ho\u1eb7c n\u1ebfu tuy\u1ec7t \u0111\u1ed1i c\u1ea7n thi\u1ebft, th\u00ec th\u1eadm ch\u00ed ch\u00fang g\u1eb7m c\u1ea3 th\u00f4ng. Th\u1ebf l\u00e0 anh \u0111\u00e0o \u0111en ch\u1eb3ng c\u00f2n b\u1ecb l\u00e0m phi\u1ec1n b\u1edfi nh\u1eefng \u0111\u1ed1i th\u1ee7 th\u1ef1c v\u1eadt phi\u1ec1n to\u00e1i kia n\u1eefa, v\u00e0 nh\u1eefng k\u1ebb m\u1edbi \u0111\u1ebfn n\u00e0y c\u1ee9 li\u00ean t\u1ee5c m\u1edf r\u1ed9ng l\u00e3nh th\u1ed5 c\u1ee7a m\u00ecnh. L\u00e3nh sam Douglas c\u0169ng c\u00f3 th\u1ec3 k\u1ec3 cho b\u1ea1n m\u1ed9t ho\u1eb7c hai c\u00e2u chuy\u1ec7n v\u1ec1 s\u1ef1 b\u1ea5t \u0111\u1ecbnh c\u1ee7a t\u01b0\u01a1ng lai. \u1ede m\u1ed9t s\u1ed1 n\u01a1i, sau khi l\u1edbn l\u00ean trong h\u01a1n m\u1ed9t tr\u0103m n\u0103m, ch\u00fang c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh nh\u1eefng g\u00e3 kh\u1ed5ng l\u1ed3 oai v\u1ec7. Tuy nhi\u00ean, c\u00e1c khu r\u1eebng kh\u00e1c l\u1ea1i b\u1ecb \u0111\u1ed1n h\u1ea1 ho\u00e0n to\u00e0n tr\u01b0\u1edbc khi l\u0169 l\u00e3nh sam Douglas tr\u01b0\u1edfng th\u00e0nh, nh\u01b0 t\u00f4i \u0111\u00e3 t\u1ef1 tr\u1ea3i nghi\u1ec7m trong n\u0103m th\u1ef1c t\u1eadp c\u1ee7a m\u00ecnh t\u1ea1i tr\u01b0\u1eddng l\u00e2m nghi\u1ec7p. M\u1ed9t khu r\u1eebng l\u00e3nh sam Douglas nh\u1ecf, g\u1ea7n b\u1ed1n m\u01b0\u01a1i tu\u1ed5i, b\u1eaft \u0111\u1ea7u ch\u1ebft d\u1ea7n. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 b\u1ed1i r\u1ed1i tr\u01b0\u1edbc v\u1ea5n \u0111\u1ec1 n\u00e0y trong m\u1ed9t th\u1eddi gian d\u00e0i. \u0110i\u1ec1u g\u00ec \u0111\u00e3 d\u1eabn \u0111\u1ebfn vi\u1ec7c s\u1ee5t gi\u1ea3m s\u1ed1 l\u00e3nh sam Douglas? Kh\u00f4ng ph\u1ea3i do n\u1ea5m, c\u0169ng kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng do c\u00f4n tr\u00f9ng. Nguy\u00ean nh\u00e2n cu\u1ed1i c\u00f9ng h\u00f3a ra l\u00e0 do s\u1ef1 d\u01b0 th\u1eeba ch\u1ea5t mangan trong \u0111\u1ea5t, v\u00e0 hi\u1ec3n nhi\u00ean l\u00e3nh sam Douglas kh\u00f4ng th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c. H\u00f3a ra c\u0169ng ch\u1eb3ng c\u00f3 th\u1ee9 g\u00ec \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cl\u00e3nh sam Douglas\u201d c\u1ea3, v\u00ec nh\u1eefng gi\u1ed1ng t\u00e1ch bi\u1ec7t v\u1edbi c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ho\u00e0n to\u00e0n kh\u00e1c nhau \u0111\u01b0\u1ee3c nh\u1eadp kh\u1ea9u v\u00e0o ch\u00e2u \u00c2u. Nh\u1eefng gi\u1ed1ng \u0111\u1ebfn t\u1eeb b\u1edd bi\u1ec3n Th\u00e1i B\u00ecnh D\u01b0\u01a1ng l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t. Tuy nhi\u00ean, h\u1ea1t c\u1ee7a ch\u00fang, b\u1ecb tr\u1ed9n l\u1eabn v\u1edbi h\u1ea1t c\u1ee7a nh\u1eefng lo\u00e0i m\u1ecdc s\u00e2u trong \u0111\u1ea5t li\u1ec1n, c\u00e1ch xa \u0111\u1ea1i d\u01b0\u01a1ng. V\u00e0 khi\u1ebfn t\u00ecnh hu\u1ed1ng tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p h\u01a1n, hai b\u00ean l\u1ea1i r\u1ea5t d\u1ec5 lai gi\u1ed1ng v\u1edbi nhau, cho ra \u0111\u1eddi nh\u1eefng h\u1eadu du\u1ec7 th\u1ec3 hi\u1ec7n c\u00e1c \u0111\u1eb7c t\u00ednh ho\u00e0n to\u00e0n kh\u00f4ng \u0111o\u00e1n tr\u01b0\u1edbc \u0111\u01b0\u1ee3c. Th\u1eadt kh\u00f4ng may, th\u01b0\u1eddng m\u1ea5t \u00edt nh\u1ea5t b\u1ed1n m\u01b0\u01a1i n\u0103m th\u00ec b\u1ea1n m\u1edbi c\u00f3 th\u1ec3 bi\u1ebft c\u00e2y c\u00f3 kh\u1ecfe m\u1ea1nh hay kh\u00f4ng. N\u1ebfu ch\u00fang kh\u1ecfe m\u1ea1nh, ch\u00fang s\u1ebd gi\u1eef nh\u1eefng chi\u1ebfc l\u00e1 kim m\u00e0u lam l\u1ee5c \u0111\u1ea7y s\u1ee9c s\u1ed1ng c\u1ee7a m\u00ecnh c\u00f9ng t\u00e1n l\u00e1 r\u1eadm r\u1ea1p v\u1edbi nh\u1eefng c\u00e0nh m\u1ecdc san s\u00e1t nhau. Th\u00e2n c\u1ee7a","nh\u1eefng c\u00e2y l\u1ea1i ch\u1ee9a qu\u00e1 nhi\u1ec1u gen t\u1eeb nh\u1eefng c\u00e2y \u0111\u1ebfn t\u1eeb nh\u1eefng v\u00f9ng \u0111\u1ea5t s\u00e2u b\u00ean trong s\u1ebd b\u1eaft \u0111\u1ea7u r\u1ec9 nh\u1ef1a v\u00e0 nh\u1eefng chi\u1ebfc l\u00e1 kim c\u1ee7a ch\u00fang s\u1ebd tr\u00f4ng r\u1ea5t \u1ee7 r\u0169. Cu\u1ed1i c\u00f9ng, \u0111\u1ea5y \u0111\u01a1n gi\u1ea3n l\u00e0 s\u1ef1 \u0111i\u1ec1u ch\u1ec9nh t\u1ef1 nhi\u00ean, m\u1eb7c d\u00f9 c\u00f3 v\u1ebb r\u1ea5t t\u00e0n nh\u1eabn. Nh\u1eefng k\u1ebb c\u00f3 gen kh\u00f4ng ph\u00f9 h\u1ee3p s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf, ngay c\u1ea3 khi qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ti\u1ebfn qua nhi\u1ec1u th\u1eadp k\u1ef7. Nh\u1eefng c\u00e2y d\u1ebb gai b\u1ea3n \u0111\u1ecba ch\u1eb3ng g\u1eb7p r\u1eafc r\u1ed1i g\u00ec trong vi\u1ec7c t\u1ed1ng kh\u1ee9 nh\u1eefng k\u1ebb x\u00e2m nh\u1eadp n\u00e0y \u0111i. Ch\u00fang s\u1eed d\u1ee5ng chi\u1ebfn thu\u1eadt t\u01b0\u01a1ng t\u1ef1 nh\u01b0 khi \u0111\u1ed1i ph\u00f3 v\u1edbi s\u1ed3i. Nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ec3 s\u1ed3i c\u00f3 th\u1ec3 th\u1eafng \u00e1p \u0111\u1ea3o l\u00e3nh sam Douglas sau nhi\u1ec1u th\u1ebf k\u1ef7 l\u00e0 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng n\u01a1i b\u00f3ng t\u1ed1i d\u00e0y \u0111\u1eb7c u \u00e1m nh\u1ea5t d\u01b0\u1edbi nh\u1eefng t\u00e1n c\u00e2y to. Con ch\u00e1u c\u1ee7a nh\u1eefng c\u00e2y m\u1eb9 \u0111\u1ebfn t\u1eeb B\u1eafc M\u1ef9 c\u1ea7n l\u01b0\u1ee3ng \u00e1nh s\u00e1ng l\u1edbn h\u01a1n th\u1ebf, v\u00e0 ch\u00fang s\u1ebd h\u00e9o r\u1ee5i trong nh\u1eefng \u201ckhu v\u01b0\u1eddn tr\u1ebb\u201d do nh\u1eefng c\u00e2y r\u1ee5ng l\u00e1 b\u1ea3n \u0111\u1ecba l\u1eadp n\u00ean. Ch\u1ec9 khi con ng\u01b0\u1eddi nh\u00fang tay gi\u00fap \u0111\u1ee1 b\u1eb1ng c\u00e1ch c\u1ee9 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i vi\u1ec7c ph\u00e1t quang c\u00e2y c\u1ed1i \u0111\u1ec3 \u00e1nh m\u1eb7t tr\u1eddi chi\u1ebfu r\u1ecdi xu\u1ed1ng \u0111\u1ea5t, th\u00ec nh\u1eefng c\u00e2y l\u00e3nh sam Douglas b\u00e9 nh\u1ecf m\u1edbi c\u00f3 c\u01a1 h\u1ed9i s\u1ed1ng s\u00f3t. T\u00ecnh h\u00ecnh r\u1ea5t nguy hi\u1ec3m khi nh\u1eefng k\u1ebb \u201cngo\u1ea1i qu\u1ed1c\u201d b\u1ea5t ng\u1edd xu\u1ea5t hi\u1ec7n l\u1ea1i r\u1ea5t t\u01b0\u01a1ng \u0111\u1ed3ng v\u1ec1 m\u1eb7t gen v\u1edbi nh\u1eefng lo\u00e0i b\u1ea3n \u0111\u1ecba. Th\u00f4ng r\u1ee5ng l\u00e1 Nh\u1eadt B\u1ea3n l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh. Khi lo\u00e0i n\u00e0y \u0111\u1ebfn \u0111\u00e2y, ch\u00fang g\u1eb7p g\u1ee1 lo\u00e0i th\u00f4ng r\u1ee5ng l\u00e1 ch\u00e2u \u00c2u. Th\u00f4ng r\u1ee5ng l\u00e1 ch\u00e2u \u00c2u th\u01b0\u1eddng m\u1ecdc cong v\u00e0 kh\u00e1 ch\u1eadm, v\u00ec v\u1eady v\u00e0o th\u1ebf k\u1ef7 tr\u01b0\u1edbc, lo\u00e0i n\u00e0y th\u01b0\u1eddng b\u1ecb thay th\u1ebf b\u1eb1ng th\u00f4ng Nh\u1eadt B\u1ea3n. C\u1ea3 hai lo\u00e0i d\u1ec5 d\u00e0ng t\u1ea1p giao v\u1edbi nhau \u0111\u1ec3 t\u1ea1o ra gi\u1ed1ng lai. \u0110i\u1ec1u n\u00e0y g\u00e2y ra nguy c\u01a1 r\u1eb1ng m\u1ed9t ng\u00e0y n\u00e0o \u0111\u00f3, m\u1ed9t kho\u1ea3ng th\u1eddi gian d\u00e0i n\u1eefa t\u00ednh t\u1eeb b\u00e2y gi\u1edd, nh\u1eefng c\u00e2y th\u00f4ng r\u1ee5ng l\u00e1 ch\u00e2u \u00c2u thu\u1ea7n ch\u1ee7ng cu\u1ed1i c\u00f9ng s\u1ebd bi\u1ebfn m\u1ea5t. C\u00f3 s\u1ef1 tr\u1ed9n l\u1eabn v\u00e0 l\u1ed9n x\u1ed9n gen nh\u01b0 v\u1eady \u0111ang di\u1ec5n ra trong khu r\u1eebng m\u00e0 t\u00f4i qu\u1ea3n l\u00fd \u1edf d\u00e3y n\u00fai Eifel, n\u01a1i m\u00e0 ch\u1eb3ng c\u00f3 c\u00e2y n\u00e0o l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba c\u1ea3. Lo\u00e0i c\u00f3 kh\u1ea3 n\u0103ng tuy\u1ec7t ch\u1ee7ng kh\u00e1c l\u00e0 c\u00e2y d\u01b0\u01a1ng \u0111en, ch\u00fang \u0111ang s\u1ed1ng l\u1eabn l\u1ed9n v\u1edbi nh\u1eefng c\u00e2y d\u01b0\u01a1ng v\u1ed1n l\u00e0 gi\u1ed1ng lai t\u1eeb lo\u00e0i d\u01b0\u01a1ng Canada do con ng\u01b0\u1eddi tr\u1ed3ng. Nh\u01b0ng h\u1ea7u h\u1ebft c\u00e1c lo\u00e0i \u0111\u01b0\u1ee3c \u0111\u01b0a v\u1ec1 \u0111\u1ec1u kh\u00f4ng t\u1ea1o th\u00e0nh m\u1ed1i \u0111e d\u1ecda cho c\u00e1c lo\u00e0i b\u1ea3n \u0111\u1ecba. Kh\u00f4ng c\u00f3 s\u1ef1 gi\u00fap \u0111\u1ee1 c\u1ee7a ch\u00fang","\u1ecd \u1ecb g \u1ef1g p g ta, nhi\u1ec1u c\u00e2y ngo\u1ea1i lai s\u1ebd l\u1ea7n n\u1eefa bi\u1ebfn m\u1ea5t sau nhi\u1ec1u nh\u1ea5t l\u00e0 v\u00e0i tr\u0103m n\u0103m. Th\u1eadm ch\u00ed d\u00f9 \u0111\u01b0\u1ee3c ch\u00fang ta gi\u00fap \u0111\u1ee1, vi\u1ec7c nh\u1eefng k\u1ebb m\u1edbi \u0111\u1ebfn n\u00e0y c\u00f3 s\u1ed1ng n\u1ed5i qua th\u1eddi gian d\u00e0i hay kh\u00f4ng l\u00e0 r\u1ea5t \u0111\u00e1ng nghi ng\u1ea1i. V\u00ec nh\u1eefng lo\u00e0i g\u00e2y h\u1ea1i g\u00e2y b\u1ec7nh cho ch\u00fang c\u0169ng bi\u1ebft l\u1ee3i d\u1ee5ng th\u01b0\u01a1ng m\u1ea1i to\u00e0n c\u1ea7u. \u0110\u00fang l\u00e0 kh\u00f4ng c\u00f3 ai ch\u1ee7 \u0111\u1ed9ng nh\u1eadp kh\u1ea9u nh\u1eefng sinh v\u1eadt n\u00e0y h\u1ebft \u2212 x\u00e9t cho c\u00f9ng, ai l\u1ea1i mu\u1ed1n \u0111em v\u1ec1 nh\u1eefng lo\u00e0i g\u00e2y h\u1ea1i ch\u1ee9? Song, ch\u1eadm m\u00e0 ch\u1eafc, l\u0169 n\u1ea5m v\u00e0 c\u00f4n tr\u00f9ng v\u1eabn \u0111ang d\u00f2 d\u1eabm b\u0103ng qua \u0110\u1ea1i T\u00e2y D\u01b0\u01a1ng ho\u1eb7c Th\u00e1i B\u00ecnh D\u01b0\u01a1ng trong nh\u1eefng l\u1ed7 g\u1ed7 x\u1ebb nh\u1eadp kh\u1ea9u r\u1ed3i \u201can c\u01b0 l\u1eadp nghi\u1ec7p\u201d t\u1ea1i ch\u00e2u \u00c2u. Th\u01b0\u1eddng ch\u00fang n\u1eb1m trong c\u00e1c v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c t\u1ea5m pallet g\u1ed7 ch\u01b0a \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u1ee7 cao \u0111\u1ec3 gi\u1ebft ch\u1ebft h\u1ebft nh\u1eefng sinh v\u1eadt g\u00e2y h\u1ea1i n\u00e0y. V\u00e0 nh\u1eefng ki\u1ec7n h\u00e0ng do ri\u00eang c\u00e1c c\u00e1 nh\u00e2n t\u1eeb n\u01b0\u1edbc ngo\u00e0i g\u1eedi \u0111i th\u1ec9nh tho\u1ea3ng c\u0169ng ch\u1ee9a nh\u1eefng con c\u00f4n tr\u00f9ng c\u00f2n s\u1ed1ng. T\u00f4i \u0111\u00e3 c\u00f3 kinh nghi\u1ec7m c\u00e1 nh\u00e2n v\u1ec1 vi\u1ec7c n\u00e0y. T\u00f4i \u0111\u1eb7t h\u00e0ng m\u1ed9t \u0111\u00f4i gi\u00e0y M\u00f4-ca\u273d c\u1ed5 t\u1eeb B\u1eafc M\u1ef9 \u0111\u1ebfn nh\u00e0 t\u00f4i t\u1ea1i \u0110\u1ee9c. Khi t\u00f4i l\u1ea5y \u0111\u00f4i gi\u00e0y da ra kh\u1ecfi l\u1edbp g\u00f3i b\u1eb1ng gi\u1ea5y b\u00e1o, nhi\u1ec1u con b\u1ecd nh\u1ecf m\u00e0u n\u00e2u li\u1ec1n b\u00f2 v\u1ec1 ph\u00eda t\u00f4i. T\u00f4i v\u1ed9i v\u00e3 b\u1eaft ch\u00fang nhanh nh\u1ea5t c\u00f3 th\u1ec3, nghi\u1ec1n ch\u1ebft ch\u00fang, r\u1ed3i v\u1ea5t ch\u00fang v\u00e0o th\u00f9ng r\u00e1c. Vi\u1ec7c nghi\u1ec1n ch\u1ebft l\u0169 b\u1ecd \u0111\u01b0\u1ee3c vi\u1ebft ra d\u01b0\u1edbi ng\u00f2i b\u00fat c\u1ee7a m\u1ed9t nh\u00e0 b\u1ea3o t\u1ed3n c\u00f3 l\u1ebd nghe kh\u00e1 k\u1ef3 c\u1ee5c, nh\u01b0ng nh\u1eefng con c\u00f4n tr\u00f9ng \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn n\u00e0y m\u1ed9t khi tho\u00e1t ra v\u00e0 an \u1ed5n \u1edf l\u1ea1i, s\u1ebd \u0111e d\u1ecda m\u1ea1ng s\u1ed1ng c\u1ee7a kh\u00f4ng ch\u1ec9 nh\u1eefng lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c mang \u0111\u1ebfn \u0111\u00e2y m\u00e0 c\u00f2n c\u1ea3 nh\u1eefng lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba. B\u1ecd s\u1eebng d\u00e0i ch\u00e2u \u00c1 ch\u00ednh l\u00e0 m\u1ed1i \u0111e d\u1ecda nh\u01b0 v\u1eady. C\u00f3 kh\u1ea3 n\u0103ng n\u00f3 \u0111\u00e3 di chuy\u1ec3n t\u1eeb Trung Qu\u1ed1c \u0111\u1ebfn ch\u00e2u \u00c2u v\u00e0 nh\u1eefng n\u01a1i kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi trong nh\u1eefng th\u00f9ng \u0111\u1ef1ng h\u00e0ng. Lo\u00e0i b\u1ecd n\u00e0y d\u00e0i m\u1ed9t inch (2,54 cm) v\u00e0 c\u00f3 r\u00e2u d\u00e0i 2 inch (5,08 cm). V\u1edbi ch\u00fang ta, con b\u1ecd \u0111\u1ea5y tr\u00f4ng th\u1eadt \u0111\u1eb9p. C\u01a1 th\u1ec3 m\u00e0u s\u1eabm c\u1ee7a ch\u00fang \u0111i\u1ec3m xuy\u1ebft nh\u1eefng \u0111\u1ed1m tr\u1eafng, v\u00e0 ch\u00fang c\u00f3 nh\u1eefng v\u1ea1ch \u0111en tr\u1eafng tr\u00ean ch\u00e2n v\u00e0 th\u00e2n. Tuy nhi\u00ean, nh\u1eefng c\u00e2y r\u1ee5ng l\u00e1 l\u1ea1i th\u1ea5y l\u0169 b\u1ecd \u0111\u1ea5y r\u00f5 l\u00e0 k\u00e9m duy\u00ean, v\u00ec lo\u00e0i n\u00e0y \u0111\u1ebb t\u1eebng qu\u1ea3 tr\u1ee9ng ri\u00eang r\u1ebd v\u00e0o h\u00e0ng h\u00e0 sa s\u1ed1 khe n\u1ee9t nh\u1ecf tr\u00ean v\u1ecf c\u00e2y. L\u0169 \u1ea5u tr\u00f9ng h\u00e1u \u0111\u00f3i n\u1edf ra r\u1ed3i \u0103n u\u1ed1ng, tr\u01b0\u1edfng th\u00e0nh th\u00ec khoan nh\u1eefng l\u1ed7 l\u1edbn b\u1eb1ng ng\u00f3n tay c\u00e1i tr\u00ean th\u00e2n c\u00e2y \u0111\u1ec3 tho\u00e1t ra. Nh\u1eefng l\u1ed7 n\u00e0y sau \u0111\u00f3 s\u1ebd b\u1ecb n\u1ea5m t\u1ea5n c\u00f4ng, v\u00e0 cu\u1ed1i c\u00f9ng th\u00e2n c\u00e2y s\u1ebd g\u00e3y. T\u1ea1i ch\u00e2u \u00c2u, l\u0169 b\u1ecd n\u00e0y v\u1eabn","\u0111ang t\u1eadp trung \u1edf nh\u1eefng khu v\u1ef1c th\u00e0nh th\u1ecb, khi\u1ebfn cu\u1ed9c s\u1ed1ng c\u1ee7a nh\u1eefng \u201c\u0111\u1ee9a tr\u1ebb \u0111\u01b0\u1eddng ph\u1ed1\u201d c\u00e0ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. Ch\u00fang ta v\u1eabn ch\u01b0a bi\u1ebft li\u1ec7u ch\u00fang c\u00f3 lan r\u1ed9ng ra c\u00e1c khu v\u1ef1c r\u1eebng r\u1eadm xa n\u01a1i ph\u1ed1 x\u00e1 hay kh\u00f4ng, v\u00ec l\u0169 b\u1ecd n\u00e0y l\u01b0\u1eddi l\u1eafm, ch\u00fang th\u00edch \u1edf trong b\u00e1n k\u00ednh v\u00e0i tr\u0103m yard xung quanh n\u01a1i ch\u00fang \u0111\u00e3 \u0111\u01b0\u1ee3c sinh ra h\u01a1n. M\u1ed9t lo\u00e0i kh\u00e1c \u0111\u01b0\u1ee3c \u201cnh\u1eadp kh\u1ea9u\u201d t\u1eeb ch\u00e2u \u00c1 l\u1ea1i h\u00e0nh x\u1eed r\u1ea5t kh\u00e1c. Lo\u00e0i n\u1ea5m \u0111\u1eb7c th\u00f9 n\u00e0y \u2013 n\u1ea5m g\u00e2y b\u1ec7nh kh\u00f4 c\u00e0nh \u1edf t\u1ea7n b\u00ec, \u0111ang tr\u00ean \u0111\u00e0 k\u1ebft li\u1ec5u h\u1ea7u h\u1ebft c\u00e1c c\u00e2y t\u1ea7n b\u00ec \u1edf ch\u00e2u \u00c2u. Tai n\u1ea5m c\u1ee7a lo\u00e0i n\u00e0y tr\u00f4ng c\u00f3 v\u1ebb v\u00f4 h\u1ea1i, th\u1eadm ch\u00ed kh\u00e1 d\u1ec5 th\u01b0\u01a1ng n\u1eefa c\u01a1. Ch\u00fang ch\u1ec9 l\u00e0 nh\u1eefng c\u00e2y n\u1ea5m b\u00e9 x\u00edu xiu m\u1ecdc tr\u00ean cu\u1ed1ng nh\u1eefng chi\u1ebfc l\u00e1 r\u1ee5ng. Tuy nhi\u00ean, b\u1ea3n th\u00e2n nh\u1eefng s\u1ee3i t\u01a1 n\u1ea5m l\u1ea1i m\u1ecdc tr\u00e0n lan trong c\u00e2y v\u00e0 gi\u1ebft h\u1ebft c\u00e2y t\u1ea7n b\u00ec n\u00e0y \u0111\u1ebfn c\u00e2y t\u1ea7n b\u00ec kh\u00e1c. M\u1ed9t v\u00e0i c\u00e2y t\u1ea7n b\u00ec d\u01b0\u1eddng nh\u01b0 v\u1eabn s\u1ed1ng s\u00f3t sau nh\u1eefng \u0111\u1ee3t t\u1ea5n c\u00f4ng l\u1eb7p \u0111i l\u1eb7p l\u1ea1i, nh\u01b0ng kh\u00e1 nghi ng\u1edd r\u1eb1ng li\u1ec7u c\u00f2n r\u1eebng t\u1ea7n b\u00ec n\u00e0o m\u1ecdc d\u1ecdc c\u00e1c b\u1edd su\u1ed1i v\u00e0 d\u00f2ng s\u00f4ng \u1edf ch\u00e2u \u00c2u trong t\u01b0\u01a1ng lai n\u1eefa hay kh\u00f4ng? Li\u00ean quan \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 n\u00e0y, t\u00f4i th\u1ec9nh tho\u1ea3ng t\u1ef1 h\u1ecfi li\u1ec7u nh\u1eefng ng\u01b0\u1eddi ki\u1ec3m l\u00e2m c\u00f3 \u0111\u00f3ng vai tr\u00f2 trong vi\u1ec7c lan truy\u1ec1n c\u0103n b\u1ec7nh n\u00e0y kh\u00f4ng? T\u00f4i \u0111\u00e3 gh\u00e9 th\u0103m nh\u1eefng khu r\u1eebng b\u1ecb t\u1ed5n h\u1ea1i n\u1eb7ng \u1edf nam \u0110\u1ee9c, v\u00e0 sau \u0111\u1ea5y, t\u00f4i l\u1ea1i quay v\u1ec1 v\u00e0 l\u00e0m vi\u1ec7c trong khu r\u1eebng m\u00ecnh \u0111ang qu\u1ea3n l\u00fd \u2013 v\u1eabn mang c\u00f9ng \u0111\u00f4i gi\u00e0y \u0111\u00f3! C\u00f3 l\u1ebd \u0111\u00e3 c\u00f3 nh\u1eefng b\u00e0o t\u1eed n\u1ea5m t\u00ed hon d\u00ednh tr\u00ean \u0111\u1ebf gi\u00e0y t\u00f4i, di chuy\u1ec3n \u0111\u1ebfn d\u00e3y n\u00fai Eifel theo ki\u1ec3u \u0111i l\u1eadu v\u00e9? D\u00f9 b\u1ea5t c\u1ee9 tr\u01b0\u1eddng h\u1ee3p n\u00e0o, th\u00ec k\u1ec3 t\u1eeb l\u00fac \u1ea5y, nh\u1eefng c\u00e2y t\u1ea7n b\u00ec \u0111\u1ea7u ti\u00ean \u1edf H\u00fcmmel c\u0169ng \u0111\u00e3 b\u1ecb c\u0103n b\u1ec7nh n\u00e0y t\u1ea5n c\u00f4ng. B\u1ea5t ch\u1ea5p t\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u tr\u00ean, t\u00f4i kh\u00f4ng lo l\u1eafng khi ngh\u0129 \u0111\u1ebfn t\u01b0\u01a1ng lai nh\u1eefng khu r\u1eebng c\u1ee7a ch\u00fang t\u00f4i. V\u00ec tr\u00ean nh\u1eefng l\u1ee5c \u0111\u1ecba l\u1edbn (v\u00e0 l\u1ee5c \u0111\u1ecba \u00c1 \u2013 \u00c2u l\u00e0 l\u1edbn nh\u1ea5t trong t\u1ea5t c\u1ea3 c\u00e1c l\u1ee5c \u0111\u1ecba), c\u00e1c lo\u00e0i lu\u00f4n ph\u1ea3i tr\u1ef1c di\u1ec7n \u0111\u01b0\u01a1ng \u0111\u1ea7u v\u1edbi nh\u1eefng lo\u00e0i m\u1edbi \u0111\u1ebfn. L\u0169 chim di tr\u00fa mang \u0111\u1ebfn nh\u1eefng lo\u00e0i v\u1eadt b\u00e9 nh\u1ecf, nh\u1eefng b\u00e0o t\u1eed n\u1ea5m, ho\u1eb7c h\u1ea1t gi\u1ed1ng c\u1ee7a nh\u1eefng lo\u00e0i c\u00e2y m\u1edbi trong l\u00f4ng c\u1ee7a ch\u00fang, ho\u1eb7c nh\u1eefng sinh v\u1eadt n\u00e0y b\u1ecb nh\u1eefng c\u01a1n b\u00e3o d\u1eef d\u1ed9i th\u1ed5i bay \u0111\u1ebfn. M\u1ed9t c\u00e2y \u0111\u01b0\u1ee3c n\u0103m tr\u0103m n\u0103m tu\u1ed5i ch\u1eafc ch\u1eafn t\u1eebng g\u1eb7p m\u1ed9t \u00edt b\u1ea5t ng\u1edd trong cu\u1ed9c \u0111\u1eddi m\u00ecnh. V\u00e0 nh\u1edd s\u1ef1 \u0111a d\u1ea1ng l\u1edbn v\u1ec1 gen \u1edf m\u1ed7i","lo\u00e0i c\u00e2y ri\u00eang l\u1ebb, n\u00ean lu\u00f4n c\u00f3 \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 th\u00e0nh c\u00f4ng v\u01b0\u1ee3t kh\u00f3. N\u1ebfu b\u1ea1n \u0111ang s\u1ed1ng hay du l\u1ecbch \u0111\u1ebfn \u0110\u1ee9c, b\u1ea1n r\u1ea5t c\u00f3 th\u1ec3 \u0111\u00e3 ch\u00fa \u00fd th\u1ea5y m\u1ed9t s\u1ed1 \u201cc\u00f4ng d\u00e2n\u201d chim ch\u00f3c m\u1edbi \u0111\u01b0\u1ee3c \u201cnh\u1eadp t\u1ecbch\u201d trong khi h\u00f3a ra ch\u00fang ch\u1eb3ng nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea5t k\u1ef3 s\u1ef1 gi\u00fap \u0111\u1ee1 n\u00e0o t\u1eeb lo\u00e0i ng\u01b0\u1eddi. Ch\u1eb3ng h\u1ea1n nh\u01b0 chim g\u00e1y tr\u1eafng, lo\u00e0i \u0111\u00e3 \u0111\u1ebfn \u0110\u1ee9c t\u1eeb v\u00f9ng \u0110\u1ecba Trung H\u1ea3i v\u00e0o nh\u1eefng n\u0103m 1930. Ti\u1ebfp \u0111\u00f3 l\u00e0 chim ho\u00e9t \u0111\u1ea7u x\u00e1m, m\u1ed9t lo\u00e0i thu\u1ed9c h\u1ecd chim ho\u00e9t. Lo\u00e0i chim m\u00e0u x\u00e1m n\u00e2u l\u1ed1m \u0111\u1ed1m \u0111en n\u00e0y \u0111\u00e3 li\u00ean t\u1ee5c di c\u01b0 v\u1ec1 h\u01b0\u1edbng t\u00e2y trong hai tr\u0103m n\u0103m. Chim b\u1eaft \u0111\u1ea7u \u0111i t\u1eeb v\u00f9ng c\u1ef1c b\u1eafc, v\u00e0 hi\u1ec7n ch\u00fang \u0111\u00e3 \u0111\u1ebfn n\u01b0\u1edbc Ph\u00e1p. Ch\u00fang ta v\u1eabn ch\u01b0a bi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u b\u1ea5t ng\u1edd n\u00e0o m\u00e0 l\u0169 chim n\u00e0y c\u00f3 l\u1ebd \u0111\u00e3 mang theo trong l\u00f4ng c\u1ee7a ch\u00fang. Nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh nh\u1eefng khu r\u1eebng b\u1ea3n \u0111\u1ecba c\u00f3 th\u1ec3 kh\u1ecfe kho\u1eafn \u0111\u1ebfn m\u1ee9c n\u00e0o khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng thay \u0111\u1ed5i nh\u01b0 v\u1eady l\u00e0 m\u1ee9c \u0111\u1ed9 hoang s\u01a1 c\u1ee7a r\u1eebng. K\u1ebft n\u1ed1i x\u00e3 h\u1ed9i c\u00e0ng nguy\u00ean v\u1eb9n v\u00e0 vi kh\u00ed h\u1eadu d\u01b0\u1edbi c\u00e2y c\u00e0ng \u00f4n h\u00f2a ch\u1eebng n\u00e0o, th\u00ec nh\u1eefng k\u1ebb ngo\u1ea1i bang x\u00e2m l\u1ea5n kia c\u00e0ng kh\u00f3 l\u00f2ng m\u00e0 \u201can c\u01b0 l\u1ea1c nghi\u1ec7p\u201d \u0111\u01b0\u1ee3c ch\u1eebng \u0111\u1ea5y. Nh\u1eefng lo\u00e0i th\u1ef1c v\u1eadt th\u01b0\u1eddng n\u1ed5i ti\u1ebfng tr\u00ean m\u1eb7t b\u00e1o l\u00e0 c\u00e1c v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh cho \u0111i\u1ec1u n\u00e0y. Ch\u1eb3ng h\u1ea1n nh\u01b0 lo\u00e0i ng\u00f2 t\u00e2y kh\u1ed5ng l\u1ed3 (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ee7 c\u1ea3i th\u01a1m hoang ho\u1eb7c \u0111\u1ea1i ho\u00e0ng d\u1ea1i). Ch\u00fang c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb v\u00f9ng Caucasus\u273d v\u00e0 c\u00f3 th\u1ec3 m\u1ecdc cao h\u01a1n 10 feet (3,048 m). Nh\u1eefng c\u1ee5m hoa tr\u1eafng c\u00f3 th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ebfn 18 inch (45,72 cm), v\u00e0 v\u00ec qu\u00e1 \u0111\u1eb9p, n\u00ean ch\u00fang \u0111\u01b0\u1ee3c nh\u1eadp kh\u1ea9u v\u00e0o Trung \u00c2u c\u00f9ng nh\u1eefng n\u01a1i kh\u00e1c v\u00e0o th\u1ebf k\u1ef7 m\u01b0\u1eddi ch\u00edn. Lo\u00e0i th\u1ef1c v\u1eadt n\u00e0y tr\u1ed1n tho\u00e1t kh\u1ecfi nh\u1eefng khu v\u01b0\u1eddn tr\u1ed3ng ch\u00fang, v\u00e0 k\u1ec3 t\u1eeb \u0111\u00f3 ch\u00fang d\u1ec5 d\u00e0ng lan r\u1ed9ng ra kh\u1eafp c\u00e1c mi\u1ec1n qu\u00ea. Ng\u00f2 t\u00e2y kh\u1ed5ng l\u1ed3 \u0111\u01b0\u1ee3c xem l\u00e0 c\u1ef1c k\u1ef3 nguy hi\u1ec3m v\u00ec nh\u1ef1a c\u1ee7a ch\u00fang khi k\u1ebft h\u1ee3p v\u1edbi tia c\u1ef1c t\u00edm c\u00f3 th\u1ec3 \u0111\u1ed1t ch\u00e1y da c\u1ee7a con ng\u01b0\u1eddi. M\u1ed7i n\u0103m, h\u00e0ng tri\u1ec7u \u0111\u00f4 \u0111\u01b0\u1ee3c chi ra cho vi\u1ec7c \u0111\u00e0o x\u1edbi v\u00e0 ti\u00eau di\u1ec7t lo\u1ea1i c\u00e2y n\u00e0y, nh\u01b0ng \u0111\u1ec1u ch\u1eb3ng mang l\u1ea1i th\u00e0nh c\u00f4ng \u0111\u00e1ng k\u1ec3. Tuy nhi\u00ean, ng\u00f2 t\u00e2y c\u00f3 th\u1ec3 lan r\u1ed9ng ch\u1ec9 v\u00ec nh\u1eefng \u0111\u1ed3ng c\u1ecf r\u1eebng nguy\u00ean b\u1ea3n s\u1ed1ng d\u1ecdc b\u1edd s\u00f4ng su\u1ed1i \u0111\u00e3 kh\u00f4ng c\u00f2n n\u1eefa.","N\u1ebfu nh\u1eefng khu r\u1eebng n\u00e0y m\u1ecdc tr\u1edf l\u1ea1i, ch\u1ed7 d\u01b0\u1edbi t\u00e1n r\u1eebng s\u1ebd t\u1ed1i t\u0103m \u0111\u1ebfn n\u1ed7i ng\u00f2 t\u00e2y s\u1ebd bi\u1ebfn m\u1ea5t. \u0110i\u1ec1u t\u01b0\u01a1ng t\u1ef1 c\u0169ng s\u1ebd x\u1ea3y ra cho lo\u00e0i b\u00f3ng n\u01b0\u1edbc Himalaya v\u00e0 lo\u00e0i c\u1ed1t kh\u00ed c\u1ee7 \u2013 nh\u1eefng lo\u00e0i c\u0169ng m\u1ecdc n\u01a1i b\u1edd s\u00f4ng v\u1eafng b\u00f3ng r\u1eebng c\u00e2y. C\u00e2y \u0111\u00e3 c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft r\u1eafc r\u1ed1i n\u1ebfu nh\u1eefng n\u1ed7 l\u1ef1c c\u1ea3i thi\u1ec7n t\u00ecnh h\u00ecnh c\u1ee7a con ng\u01b0\u1eddi cho ph\u00e9p ch\u00fang gi\u00e0nh \u0111\u01b0\u1ee3c quy\u1ec1n ki\u1ec3m so\u00e1t. T\u00f4i \u0111\u00e3 vi\u1ebft v\u1ec1 nh\u1eefng lo\u00e0i ngo\u1ea1i l\u1ea1i nhi\u1ec1u \u0111\u1ebfn n\u1ed7i \u0111\u00e2y c\u00f3 l\u1ebd l\u00e0 ch\u1ed7 \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e2u h\u1ecfi r\u1eb1ng thu\u1eadt ng\u1eef \u201cb\u1ea3n \u0111\u1ecba\u201d c\u00f3 ngh\u0129a l\u00e0 g\u00ec? Ch\u00fang ta c\u00f3 khuynh h\u01b0\u1edbng g\u1ecdi c\u00e1c lo\u00e0i l\u00e0 b\u1ea3n \u0111\u1ecba n\u1ebfu ch\u00fang xu\u1ea5t hi\u1ec7n t\u1ef1 nhi\u00ean b\u00ean trong bi\u00ean gi\u1edbi c\u1ee7a m\u1ed9t qu\u1ed1c gia. M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh t\u1eeb th\u1ebf gi\u1edbi \u0111\u1ed9ng v\u1eadt l\u00e0 lo\u00e0i s\u00f3i \u2013 lo\u00e0i \u0111\u00e3 t\u00e1i xu\u1ea5t hi\u1ec7n \u1edf h\u1ea7u h\u1ebft - c\u00e1c qu\u1ed1c gia Trung \u00c2u trong nh\u1eefng n\u0103m 1990 v\u00e0 k\u1ec3 t\u1eeb \u0111\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng \u0111\u1ed5i c\u1ee7a h\u1ec7 \u0111\u1ed9ng v\u1eadt. Lo\u00e0i n\u00e0y \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf \u00dd, Ph\u00e1p v\u00e0 Ba Lan th\u00ec c\u00f2n s\u1edbm h\u01a1n th\u1ebf. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 s\u00f3i \u0111\u00e3 l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba \u1edf ch\u00e2u \u00c2u trong m\u1ed9t th\u1eddi gian d\u00e0i, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ec9 l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba \u1edf t\u1eebng qu\u1ed1c gia ri\u00eang l\u1ebb. Nh\u01b0ng ch\u1eb3ng ph\u1ea3i \u0111\u01a1n v\u1ecb \u0111\u1ecba l\u00fd n\u00e0y v\u1eabn qu\u00e1 r\u1ed9ng hay sao? Khi ch\u00fang ta n\u00f3i v\u1ec1 c\u00e1 heo\u273d b\u1ea3n \u0111\u1ecba \u1edf \u0110\u1ee9c, th\u00ec \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a ch\u00fang c\u0169ng c\u01b0 ng\u1ee5 \u1edf khu v\u1ef1c th\u01b0\u1ee3ng l\u01b0u s\u00f4ng Rhine? Nh\u01b0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y, \u0111\u1ecbnh ngh\u0129a n\u00e0y ch\u1eb3ng h\u1ee3p l\u00fd ch\u00fat n\u00e0o. \u201cB\u1ea3n \u0111\u1ecba\u201d n\u00ean \u0111\u01b0\u1ee3c hi\u1ec3u theo quy m\u00f4 nh\u1ecf h\u01a1n r\u1ea5t nhi\u1ec1u, v\u00e0 kh\u00f4ng d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng bi\u00ean gi\u1edbi c\u1ee7a con ng\u01b0\u1eddi, m\u00e0 ph\u1ea3i d\u1ef1a tr\u00ean m\u00f4i tr\u01b0\u1eddng s\u1ed1ng. M\u00f4i tr\u01b0\u1eddng s\u1ed1ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m t\u1ea1i n\u01a1i \u0111\u00f3 (n\u01b0\u1edbc, \u0111\u1ecba th\u1ebf, \u0111\u1ecba h\u00ecnh) c\u00f9ng kh\u00ed h\u1eadu \u0111\u1ecba ph\u01b0\u01a1ng. Sau k\u1ef7 b\u0103ng h\u00e0 v\u1eeba qua, c\u00e2y chuy\u1ec3n \u0111\u1ebfn nh\u1eefng m\u00f4i tr\u01b0\u1eddng s\u1ed1ng m\u00e0 ch\u00fang th\u1ea5y \u0111i\u1ec1u ki\u1ec7n n\u01a1i \u0111\u00f3 ph\u00f9 h\u1ee3p v\u1edbi ch\u00fang. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0, v\u00ed d\u1ee5, v\u00e2n sam xu\u1ea5t hi\u1ec7n m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean (do \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba) \u1edf \u0111\u1ed9 cao 4.000 feet (1,2192 km) so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n t\u1ea1i R\u1eebng Bavarian, nh\u01b0ng ch\u00fang l\u1ea1i kh\u00f4ng xu\u1ea5t hi\u1ec7n m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean (do \u0111\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c xem l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba) \u1edf v\u1ecb tr\u00ed 1.300 feet (0,39624 km), th\u1ea5p h\u01a1n v\u00e0 ch\u1ec9 xa ch\u1ed7 tr\u00ean n\u1eeda d\u1eb7m (0,8 km) \u2013 n\u01a1i d\u1ebb gai v\u00e0 l\u00e3nh sam th\u1ed1ng tr\u1ecb. C\u00e1c chuy\u00ean gia \u0111\u00e3 \u0111\u01b0a ra thu\u1eadt ng\u1eef \u201cm\u00f4i tr\u01b0\u1eddng s\u1ed1ng \u0111\u1eb7c th\u00f9\u201d \u2013 \u0111\u01a1n gi\u1ea3n c\u00f3 ngh\u0129a","l\u00e0 m\u1ed7i lo\u00e0i \u0111\u1ec1u c\u00f3 m\u00f4i tr\u01b0\u1eddng s\u1ed1ng m\u00e0 ch\u00fang r\u1ea5t h\u1ea1nh ph\u00fac khi sinh tr\u01b0\u1edfng \u1edf \u0111\u00f3. Tr\u00e1i ng\u01b0\u1ee3c v\u1edbi c\u00e1c \u0111\u01b0\u1eddng bi\u00ean gi\u1edbi qu\u1ed1c gia c\u00f3 quy m\u00f4 l\u1edbn, c\u00e1c bi\u00ean gi\u1edbi m\u00f4i tr\u01b0\u1eddng s\u1ed1ng c\u1ee7a c\u00e1c lo\u00e0i l\u1ea1i t\u01b0\u01a1ng t\u1ef1 nh\u01b0 s\u1ef1 ph\u00e1t tri\u1ec3n nhanh c\u1ee7a c\u00e1c th\u00e0nh bang nh\u1ecf. Khi con ng\u01b0\u1eddi l\u1edd \u0111i c\u00e1c ranh gi\u1edbi v\u00e0 mang v\u00e2n sam c\u00f9ng th\u00f4ng xu\u1ed1ng n\u01a1i \u0111\u1ed9 cao th\u1ea5p h\u01a1n v\u00e0 \u1ea5m \u00e1p h\u01a1n, nh\u1eefng c\u00e2y ng\u00e0nh th\u00f4ng n\u00e0y s\u1ebd kh\u00f4ng ph\u1ea3i l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba t\u1ea1i v\u1ecb tr\u00ed m\u1edbi n\u00e0y; ch\u00fang s\u1ebd l\u00e0 d\u00e2n nh\u1eadp c\u01b0. V\u00e0 nh\u01b0 th\u1ebf ch\u00fang ta s\u1ebd chuy\u1ec3n sang v\u00ed d\u1ee5 y\u00eau th\u00edch c\u1ee7a t\u00f4i: Ki\u1ebfn g\u1ed7 \u0111\u1ecf. T\u1ea1i ch\u00e2u \u00c2u, ki\u1ebfn g\u1ed7 \u0111\u1ecf l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a s\u1ef1 b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean. T\u1ea1i nhi\u1ec1u n\u01a1i, ch\u00fang \u0111\u01b0\u1ee3c khoanh v\u00f9ng v\u00e0 b\u1ea3o v\u1ec7; trong tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra xung \u0111\u1ed9t, ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111i t\u00e1i \u0111\u1ecbnh c\u01b0 n\u01a1i kh\u00e1c. Kh\u00f4ng th\u1ec3 c\u00f3 b\u1ea5t k\u1ef3 l\u1eddi ph\u1ea3n \u0111\u1ed1i n\u00e0o v\u1ec1 vi\u1ec7c n\u00e0y v\u00ec th\u1ee9 m\u00e0 ch\u00fang ta \u0111ang n\u00f3i \u0111\u1ebfn \u1edf \u0111\u00e2y l\u00e0 m\u1ed9t lo\u00e0i \u0111ang b\u1ecb \u0111e d\u1ecda. B\u1ecb \u0111e d\u1ecda \u01b0? Nh\u01b0ng ki\u1ebfn g\u1ed7 \u0111\u1ecf c\u0169ng l\u00e0 \u201cd\u00e2n nh\u1eadp c\u01b0\u201d m\u00e0, cho n\u00ean, t\u00f4i s\u1ebd tranh c\u00e3i r\u1eb1ng c\u00e1c n\u1ed7 l\u1ef1c \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00fang l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft. Ch\u00fang di chuy\u1ec3n b\u1eb1ng c\u00e1ch b\u00e1m \u0111u\u00f4i v\u00e2n sam v\u00e0 th\u00f4ng \u0111\u01b0\u1ee3c tr\u1ed3ng th\u01b0\u01a1ng m\u1ea1i. B\u1ea1n c\u00f3 th\u1ec3 n\u00f3i r\u1eb1ng ch\u00fang b\u00e1m ri\u1ebft l\u1ea5y nh\u1eefng chi\u1ebfc l\u00e1 kim v\u00ec m\u1ee5c \u0111\u00edch s\u1ed1ng c\u00f2n, b\u1edfi kh\u00f4ng c\u00f3 nh\u1eefng chi\u1ebfc l\u00e1 h\u1eb9p, nh\u1ecdn c\u1ee7a c\u00e1c c\u00e2y ng\u00e0nh th\u00f4ng, th\u00ec ch\u00fang kh\u00f4ng th\u1ec3 x\u00e2y t\u1ed5 \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf r\u1eb1ng ch\u00fang kh\u00f4ng hi\u1ec7n di\u1ec7n trong nh\u1eefng khu r\u1eebng c\u00e2y l\u00e1 r\u1ee5ng b\u1ea3n \u0111\u1ecba ban \u0111\u1ea7u. H\u01a1n n\u1eefa, ch\u00fang th\u00edch m\u1eb7t tr\u1eddi, v\u00e0 ch\u00fang c\u1ea7n \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi chi\u1ebfu l\u00ean t\u1ed5 m\u00ecnh \u00edt nh\u1ea5t v\u00e0i ti\u1ebfng m\u1ed7i ng\u00e0y. \u0110\u1eb7c bi\u1ec7t v\u00e0o m\u00f9a xu\u00e2n v\u00e0 m\u00f9a thu, khi tr\u1eddi r\u00e9t bu\u1ed1t, m\u1ed9t \u00edt n\u1eafng \u1ea5m s\u1ebd b\u1ea3o \u0111\u1ea3m cho ki\u1ebfn c\u00f3 th\u00eam \u00edt ng\u00e0y \u0111i s\u1ee5c s\u1ea1o xung quanh. Do v\u1eady, nh\u1eefng khu r\u1eebng d\u1ebb gai t\u1ed1i om kh\u00f4ng th\u1ec3 n\u00e0o l\u00e0m m\u00f4i tr\u01b0\u1eddng s\u1ed1ng c\u1ee7a ki\u1ebfn g\u1ed7 \u0111\u1ecf \u0111\u01b0\u1ee3c, v\u00e0 l\u0169 ki\u1ebfn s\u1ebd m\u00e3i m\u00e3i \u0111\u1ed9i \u01a1n c\u00e1c ki\u1ec3m l\u00e2m vi\u00ean v\u00ec c\u00f3 k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng vi\u1ec7c tr\u1ed3ng v\u00e2n sam v\u00e0 th\u00f4ng.","\u20143\u26053\u2014 KH\u00d4NG KH\u00cd R\u1eeaNG R\u1eacM L\u00c0NH M\u1ea0NH Kh\u00f4ng kh\u00ed r\u1eebng r\u1eadm l\u00e0 v\u00ed d\u1ee5 ho\u00e0n h\u1ea3o v\u1ec1 kh\u00f4ng kh\u00ed m\u1ea1nh l\u00e0nh. Nh\u1eefng ng\u01b0\u1eddi mu\u1ed1n h\u00edt m\u1ed9t h\u01a1i th\u1eadt s\u00e2u kh\u00f4ng kh\u00ed trong l\u00e0nh ho\u1eb7c tham gia c\u00e1c ho\u1ea1t \u0111\u1ed9ng th\u1ec3 ch\u1ea5t trong kh\u00f4ng kh\u00ed \u0111\u1eb7c bi\u1ec7t d\u1ec5 ch\u1ecbu s\u1ebd b\u01b0\u1edbc v\u00e0o r\u1eebng r\u1eadm. C\u00f3 \u0111\u1ee7 m\u1ecdi l\u00fd do \u0111\u1ec3 l\u00e0m nh\u01b0 th\u1ec3. Kh\u00f4ng kh\u00ed th\u1eadt s\u1ef1 s\u1ea1ch h\u01a1n nhi\u1ec1u b\u00ean d\u01b0\u1edbi c\u00e2y, v\u00ec c\u00e2y \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u00e1y l\u1ecdc kh\u00f4ng kh\u00ed kh\u1ed5ng l\u1ed3. Nh\u1eefng chi\u1ebfc l\u00e1 phi\u1ebfn v\u00e0 l\u00e1 kim c\u1ee7a ch\u00fang \u0111u \u0111\u01b0a trong l\u00e0n gi\u00f3 nh\u1eb9 d\u00ecu d\u1ecbu, b\u1eaft l\u1ea5y nh\u1eefng h\u1ea1t l\u1edbn l\u1eabn nh\u1ecf bay l\u1eefng l\u1edd qua. M\u1ed7i n\u0103m v\u00e0 m\u1ed7i d\u1eb7m vu\u00f4ng, l\u01b0\u1ee3ng v\u1eadt ch\u1ea5t b\u1eaft \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ebfn 20.000 t\u1ea5n. C\u00e2y gi\u1eef \u0111\u01b0\u1ee3c nhi\u1ec1u v\u1eadt ch\u1ea5t \u0111\u1ebfn v\u1eady v\u00ec v\u00f2m l\u00e1 c\u1ee7a ch\u00fang t\u1ea1o th\u00e0nh m\u1ed9t di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t r\u1ea5t l\u1edbn. N\u1ebfu so s\u00e1nh v\u1edbi m\u1ed9t \u0111\u1ed3ng c\u1ecf c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng t\u1ef1, th\u00ec di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t r\u1eebng l\u1edbn h\u01a1n c\u1ea3 tr\u0103m l\u1ea7n, ph\u1ea7n l\u1edbn do c\u00e2y th\u00e2n g\u1ed7 v\u00e0 c\u1ecf c\u00f3 k\u00edch c\u1ee1 kh\u00e1c nhau. Nh\u1eefng h\u1ea1t b\u1ecb l\u1ecdc \u0111i kh\u00f4ng nh\u1eefng g\u1ed3m c\u00e1c ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed3 h\u00f3ng, m\u00e0 c\u00f2n g\u1ed3m ph\u1ea5n hoa v\u00e0 b\u1ee5i b\u1ecb th\u1ed5i t\u1eeb d\u01b0\u1edbi \u0111\u1ea5t l\u00ean. Tuy nhi\u00ean, nh\u1eefng h\u1ea1t b\u1ecb l\u1ecdc c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi th\u00ec \u0111\u1eb7c bi\u1ec7t nguy h\u1ea1i. Axit, c\u00e1c ch\u1ea5t hydrocarbon \u0111\u1ed9c h\u1ea1i, v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t nit\u01a1 t\u00edch t\u1ee5 b\u00ean trong c\u00e2y gi\u1ed1ng nh\u01b0 m\u1ee1 b\u00e1m trong b\u1ed9 l\u1ecdc c\u1ee7a qu\u1ea1t th\u00f4ng kh\u00ed l\u1eafp tr\u00ean b\u1ebfp n\u1ea5u \u0103n. Nh\u01b0ng c\u00e2y kh\u00f4ng ch\u1ec9 l\u1ecdc v\u1eadt ch\u1ea5t kh\u1ecfi kh\u00f4ng kh\u00ed, m\u00e0 c\u00f2n b\u01a1m c\u00e1c ch\u1ea5t v\u00e0o trong kh\u00f4ng kh\u00ed. Ch\u00fang trao \u0111\u1ed5i c\u00e1c b\u1ee9c th\u01b0 m\u00f9i h\u01b0\u01a1ng v\u00e0, d\u0129 nhi\u00ean, c\u00f2n b\u01a1m phytoncide ra ngo\u00e0i \u2013 c\u1ea3 hai \u0111i\u1ec1u n\u00e0y t\u00f4i \u0111\u1ec1u \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn. C\u00e1c khu r\u1eebng \u0111\u1ec1u kh\u00e1c nhau r\u1ea5t nhi\u1ec1u, t\u00f9y thu\u1ed9c v\u00e0o lo\u00e0i c\u00e2y m\u1ecdc trong r\u1eebng. C\u00e1c r\u1eebng c\u00e2y ng\u00e0nh th\u00f4ng gi\u1ea3m \u0111\u01b0\u1ee3c m\u1ed9t","l\u01b0\u1ee3ng vi tr\u00f9ng \u0111\u00e1ng k\u1ec3 trong kh\u00f4ng kh\u00ed \u2013 \u0111i\u1ec1u khi\u1ebfn nh\u1eefng ng\u01b0\u1eddi \u0111ang ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng ch\u1ee9ng d\u1ecb \u1ee9ng c\u1ea3m th\u1ea5y \u0111\u1eb7c bi\u1ec7t d\u1ec5 ch\u1ecbu. Tuy nhi\u00ean, c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng l\u1ea1i r\u1eebng \u0111\u00e3 \u0111em v\u00e2n sam v\u00e0 th\u00f4ng \u0111\u1ebfn nh\u1eefng n\u01a1i m\u00e0 ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 lo\u00e0i b\u1ea3n \u0111\u1ecba, v\u00e0 nh\u1eefng k\u1ebb m\u1edbi \u0111\u1ebfn n\u00e0y s\u1ebd ph\u1ea3i tr\u1ea3i qua nh\u1eefng kh\u00f3 kh\u0103n n\u1eb7ng n\u1ec1 \u1edf m\u00f4i tr\u01b0\u1eddng s\u1ed1ng m\u1edbi. Th\u00f4ng th\u01b0\u1eddng, ch\u00fang \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn nh\u1eefng n\u01a1i c\u00f3 chi\u1ec1u cao kh\u00e1 th\u1ea5p so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n \u2013 nh\u1eefng n\u01a1i qu\u00e1 \u1ea5m v\u00e0 kh\u00f4 \u0111\u1ec3 c\u00e2y ng\u00e0nh th\u00f4ng c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n t\u1ed1t t\u01b0\u01a1i. K\u1ebft qu\u1ea3, kh\u00f4ng kh\u00ed s\u1ebd b\u1ee5i b\u1eb7m h\u01a1n, nh\u01b0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y r\u00f5 khi nh\u1eefng h\u1ea1t b\u1ee5i \u0111\u01b0\u1ee3c r\u1ecdi b\u1eadt l\u00ean trong lu\u1ed3ng n\u1eafng chi\u1ebfu xu\u1ed1ng \u0111\u1ea5t v\u00e0o m\u1ed9t ng\u00e0y h\u00e8. V\u00ec v\u00e2n sam v\u00e0 th\u00f4ng lu\u00f4n c\u00f3 nguy c\u01a1 ch\u1ebft kh\u00e1t, n\u00ean ch\u00fang tr\u1edf th\u00e0nh con m\u1ed3i d\u1ec5 x\u1eed l\u00fd \u0111\u1ed1i v\u1edbi l\u0169 b\u1ecd v\u1ecf c\u00e2y \u2013 lo\u00e0i \u0111i theo \u0111\u1ec3 \u0111\u00e1nh ch\u00e9n ch\u00fang. Ngay th\u1eddi \u0111i\u1ec3m \u0111\u00f3, nh\u1eefng b\u1ee9c th\u01b0 m\u00f9i h\u01b0\u01a1ng th\u1ec3 hi\u1ec7n s\u1ef1 ho\u1ea3ng lo\u1ea1n t\u1ed9t \u0111\u1ed9 b\u1eaft \u0111\u1ea7u xo\u00e1y quanh v\u00f2m r\u1eebng. C\u00e2y \u0111ang \u201ck\u00eau g\u00e0o\u201d xin gi\u00fap \u0111\u1ee1 v\u00e0 k\u00edch ho\u1ea1t kho v\u0169 kh\u00ed h\u00f3a h\u1ecdc t\u1ef1 v\u1ec7 c\u1ee7a ch\u00fang. B\u1ea1n s\u1ebd c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c t\u1ea5t c\u1ea3 nh\u1eefng th\u1ee9 n\u00e0y qua t\u1eebng h\u01a1i th\u1edf ng\u1eadp h\u01b0\u01a1ng r\u1eebng m\u00e0 b\u1ea1n h\u00edt v\u00e0o trong ph\u1ed5i. V\u1eady c\u00f3 kh\u1ea3 n\u0103ng b\u1ea1n s\u1ebd v\u00f4 th\u1ee9c nh\u1eadn ra t\u00ecnh tr\u1ea1ng b\u00e1o \u0111\u1ed9ng c\u1ee7a c\u00e2y kh\u00f4ng? H\u00e3y xem x\u00e9t \u0111i\u1ec1u n\u00e0y. Nh\u1eefng khu r\u1eebng b\u1ecb \u0111e d\u1ecda v\u1ed1n \u0111\u00e3 thi\u1ebfu \u1ed5n \u0111\u1ecbnh, do \u0111\u00f3, ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 n\u01a1i th\u00edch h\u1ee3p cho con ng\u01b0\u1eddi sinh s\u1ed1ng. Do t\u1ed5 ti\u00ean th\u1eddi k\u1ef3 \u0110\u1ed3 \u0110\u00e1 c\u1ee7a ch\u00fang ta lu\u00f4n t\u00ecm ki\u1ebfm nh\u1eefng ch\u1ed7 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 c\u1eafm tr\u1ea1i, n\u00ean n\u1ebfu ch\u00fang ta c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng khu v\u1ef1c xung quanh m\u00ecnh b\u1eb1ng tr\u1ef1c gi\u00e1c th\u00ec c\u0169ng h\u1ee3p l\u00fd th\u00f4i. C\u00f3 m\u1ed9t theo d\u00f5i khoa h\u1ecdc n\u00f3i v\u1ec1 v\u1ea5n \u0111\u1ec1 n\u00e0y: Huy\u1ebft \u00e1p c\u1ee7a nh\u1eefng du kh\u00e1ch \u0111\u1ebfn th\u0103m r\u1eebng s\u1ebd t\u0103ng khi h\u1ecd \u0111\u1ee9ng d\u01b0\u1edbi nh\u1eefng c\u00e2y ng\u00e0nh th\u00f4ng, nh\u01b0ng huy\u1ebft \u00e1p s\u1ebd \u1ed5n \u0111\u1ecbnh l\u1ea1i v\u00e0 h\u1ea1 xu\u1ed1ng khi h\u1ecd \u0111\u1ee9ng trong m\u1ed9t qu\u1ea7n th\u1ee5 s\u1ed3i. T\u1ea1i sao b\u1ea1n kh\u00f4ng t\u1ef1 ki\u1ec3m tra v\u00e0 xem th\u1eed lo\u1ea1i r\u1eebng n\u00e0o m\u00e0 \u1edf \u0111\u00f3 b\u1ea1n th\u1ea5y tho\u1ea3i m\u00e1i nh\u1ea5t? Li\u1ec7u ch\u00fang ta c\u00f3 th\u1ec3 b\u1eb1ng c\u00e1ch n\u00e0o \u0111\u1ea5y l\u1eafng nghe \u0111\u01b0\u1ee3c nh\u1eefng g\u00ec c\u00e2y n\u00f3i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft g\u1ea7n \u0111\u00e2y trong c\u00e1c t\u00e0i li\u1ec7u chuy\u00ean m\u00f4n. C\u00e1c nh\u00e0 khoa h\u1ecdc H\u00e0n Qu\u1ed1c \u0111\u00e3 theo d\u00f5i nh\u1eefng ph\u1ee5 n\u1eef l\u1edbn tu\u1ed5i khi h\u1ecd \u0111i b\u1ed9 qua khu v\u1ef1c r\u1eebng r\u1eadm v\u00e0"]
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