V\u00e0o sau nh\u1eefng n\u0103m 80 c\u1ee7a th\u1ebf k\u1ec9 XX, kh\u00ed h\u1eadu to\u00e0n c\u1ea7u d\u1ea7n d\u1ea7n n\u00f3ng l\u00ean, kh\u00f4ng \u00edt nh\u1eefng khu v\u1ef1c \u0111\u00e3 xu\u1ea5t hi\u1ec7n hi\u1ec7n t\u01b0\u1ee3ng m\u00f9a \u0111\u00f4ng n\u00f3ng l\u1ea1 l\u00f9ng, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 mang \u0111\u1ebfn m\u1ed9t lo\u1ea1t nh\u1eefng h\u1eadu qu\u1ea3 kh\u00f4ng t\u1ed1t \u0111\u1ed1i v\u1edbi x\u00e3 h\u1ed9i lo\u00e0i ng\u01b0\u1eddi, v\u00ec v\u1eady, c\u01a1 quan m\u00f4i tr\u01b0\u1eddng Li\u00ean h\u1ee3p qu\u1ed1c quy\u1ebft \u0111\u1ecbnh ch\u1ee7 \u0111\u1ec1 c\u1ee7a “Ng\u00e0y b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng th\u1ebf gi\u1edbi” ng\u00e0y 5-6-1989 l\u00e0 “H\u00e3y c\u1ea3nh gi\u00e1c, to\u00e0n c\u1ea7u \u0111ang n\u00f3ng l\u00ean”.<\/p>\n\n\n\n
Nguy\u00ean nh\u00e2n n\u00e0o l\u00e0m cho nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed c\u1ee7a to\u00e0n c\u1ea7u l\u00ean cao v\u1eady? Gi\u00e1o s\u01b0 – nh\u00e0 ho\u00e1 h\u1ecdc kh\u00ed t\u01b0\u1ee3ng thu\u1ed9c Trung t\u00e2m nghi\u00ean c\u1ee9u kh\u00ed t\u01b0\u1ee3ng qu\u1ed1c gia M\u0129 cho r\u1eb1ng, ngo\u00e0i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a lo\u00e0i ng\u01b0\u1eddi l\u00e0m t\u0103ng l\u00ean kh\u00f4ng ng\u1eebng h\u00e0m l\u01b0\u1ee3ng cacbon \u0111ioxit trong kh\u00ed quy\u1ec3n, t\u1ea1o th\u00e0nh “hi\u1ec7u \u1ee9ng nh\u00e0 k\u00ednh” v\u00e0 c\u00e1c nh\u00e2n t\u1ed1 nh\u01b0 hi\u1ec7n t\u01b0\u1ee3ng El Nino ra, lo\u00e0i m\u1ed1i trong b\u1ed9 c\u00f4n tr\u00f9ng c\u0169ng c\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u0103ng nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u. \u0110i\u1ec1u n\u00e0y h\u00ecnh nh\u01b0 \u0111\u00e3 l\u00e0m cho m\u1ecdi ng\u01b0\u1eddi kh\u00f4ng sao hi\u1ec3u n\u1ed5i, con m\u1ed1i nh\u1ecf b\u00e9 v\u1edbi nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed l\u00ean cao, l\u00e0m sao l\u1ea1i c\u00f3 th\u1ec3 li\u00ean quan \u0111\u01b0\u1ee3c v\u1edbi nhau?<\/p>\n\n\n\n
Ch\u00fang ta bi\u1ebft r\u1eb1ng, trong b\u1ee5ng c\u1ee7a con m\u1ed1i t\u1ed3n t\u1ea1i kho\u1ea3ng h\u01a1n 100 lo\u1ea1i vi khu\u1ea9n v\u00e0 \u0111\u1ed9ng v\u1eadt nguy\u00ean sinh. Lo\u00e0i m\u1ed1i th\u00edch g\u1eb7m \u0111\u1ed3 g\u1ed7, sau khi nu\u1ed1t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn th\u1ee9c \u0103n ch\u1ea5t xenlul\u00f4 trong l\u00f5i g\u1ed7 v\u00e0o b\u1ee5ng, nh\u1edd c\u00e1c vi khu\u1ea9n, ch\u1ea5t xenlul\u00f4 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ti\u00eau ho\u00e1. Nh\u01b0ng lo\u00e0i vi sinh v\u1eadt n\u00e0y trong qu\u00e1 tr\u00ecnh ti\u00eau ho\u00e1 ph\u00e2n gi\u1ea3i ch\u1ea5t xenlul\u00f4, t\u1ea5t nhi\u00ean s\u1ebd s\u1ea3n sinh ra m\u1ed9t lo\u1ea1i s\u1ea3n ph\u1ea9m ph\u1ee5 -m\u00eatan.<\/p>\n\n\n\n
M\u00eatan ch\u00ednh l\u00e0 kh\u00ed \u0111\u1ed1t m\u00e0 m\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng n\u00f3i. N\u00f3 \u1edf trong t\u1ea7ng kh\u00ed quy\u1ec3n t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p, sau khi qua ph\u1ea3n \u1ee9ng c\u00f3 th\u1ec3 h\u00ecnh th\u00e0nh cacbon \u0111ioxit, c\u00f2n s\u1ef1 t\u0103ng th\u00eam c\u1ee7a cacbon \u0111ioxit trong kh\u00ed quy\u1ec3n s\u1ebd d\u1eabn \u0111\u1ebfn nhi\u1ec7t l\u01b0\u1ee3ng trong Tr\u00e1i \u0110\u1ea5t kh\u00f4ng d\u1ec5 to\u1ea3 ra, h\u00ecnh th\u00e0nh n\u00ean “hi\u1ec7u \u1ee9ng nh\u00e0 k\u00ednh”.<\/p>\n\n\n\n
Lo\u00e0i m\u1ed1i sinh ra m\u00eatan, tuy \u0111\u00e3 c\u00f3 l\u1ecbch s\u1eed h\u00e0ng tr\u0103m tri\u1ec7u n\u0103m, nh\u01b0ng gi\u00e1o s\u01b0 cho r\u1eb1ng, l\u01b0\u1ee3ng m\u00eatan m\u00e0 ch\u00fang s\u1ea3n sinh ra m\u1ea5y n\u0103m g\u1ea7n \u0111\u00e2y m\u1edbi t\u0103ng l\u00ean, d\u1ef1 \u0111o\u00e1n m\u1ed7i n\u0103m th\u1ea3i ra kh\u00ed quy\u1ec3n 150 tri\u1ec7u t\u1ea5n m\u00eatan. \u0110\u00e2y l\u00e0 con s\u1ed1 kh\u00f4ng nh\u1ecf v\u00e0 ch\u1eafc ch\u1eafn s\u1ebd c\u00f3 \u1ea3nh h\u01b0\u1edfng nh\u1ea5t \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi s\u1ef1 t\u0103ng cao c\u1ee7a nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"
V\u00e0o sau nh\u1eefng n\u0103m 80 c\u1ee7a th\u1ebf k\u1ec9 XX, kh\u00ed h\u1eadu to\u00e0n c\u1ea7u d\u1ea7n d\u1ea7n n\u00f3ng l\u00ean, kh\u00f4ng \u00edt nh\u1eefng khu v\u1ef1c \u0111\u00e3 xu\u1ea5t hi\u1ec7n hi\u1ec7n t\u01b0\u1ee3ng m\u00f9a \u0111\u00f4ng n\u00f3ng l\u1ea1 l\u00f9ng, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 mang \u0111\u1ebfn m\u1ed9t lo\u1ea1t nh\u1eefng h\u1eadu qu\u1ea3 kh\u00f4ng t\u1ed1t \u0111\u1ed1i v\u1edbi x\u00e3 h\u1ed9i lo\u00e0i ng\u01b0\u1eddi, v\u00ec v\u1eady, c\u01a1 quan m\u00f4i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,10],"tags":[],"class_list":["post-8320","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-sinh-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=8320"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8320\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}