Ch\u00fang ta bi\u1ebft r\u1eb1ng oxi l\u00e0 ch\u1ea5t c\u1ea7n thi\u1ebft cho s\u1ef1 s\u1ed1ng c\u00f2n c\u1ee7a lo\u00e0i ng\u01b0\u1eddi tr\u00ean \u0111\u1ecba c\u1ea7u. N\u1ebfu kh\u00f4ng c\u00f3 oxi \u0111\u1ea7y \u0111\u1ee7 con ng\u01b0\u1eddi s\u1ebd kh\u00f4ng th\u1ec3 sinh t\u1ed3n.<\/p>\n\n\n\n
Trong b\u1ea7u kh\u00ed quy\u1ec3n, h\u00e0m l\u01b0\u1ee3ng oxi l\u00e0 21%, h\u00e0m l\u01b0\u1ee3ng kh\u00ed cacbonic l\u00e0 0,032%. N\u1ebfu l\u01b0\u1ee3ng cacbon trong b\u1ea7u kh\u00ed quy\u1ec3n t\u0103ng l\u00ean s\u1ebd khi\u1ebfn cho kh\u00ed oxi v\u00e0 cacbonic m\u1ea5t \u0111i c\u00e2n b\u1eb1ng, sinh t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a con ng\u01b0\u1eddi c\u00f9ng c\u00e1c sinh v\u1eadt kh\u00e1c \u0111\u1ec1u ch\u1ecbu \u1ea3nh h\u01b0\u1edfng. Khi h\u00e0m l\u01b0\u1ee3ng kh\u00ed cacbonic trong kh\u00f4ng kh\u00ed l\u00e0 0,005% th\u00ec s\u1ef1 h\u00f4 h\u1ea5p c\u1ee7a con ng\u01b0\u1eddi s\u1ebd g\u1eb7p kh\u00f3 kh\u0103n, khi \u0111\u1ea1t t\u1edbi 0,2% \u0111\u1ebfn 0.6% con ng\u01b0\u1eddi s\u1ebd xu\u1ea5t hi\u1ec7n tri\u1ec7u ch\u1ee9ng tr\u00fang \u0111\u1ed9c r\u00f5 r\u1ec7t. \u1ede th\u00e0nh ph\u1ed1 v\u00e0 c\u00e1c khu c\u00f4ng nghi\u1ec7p do d\u00e2n s\u1ed1 t\u1eadp trung, l\u01b0\u1ee3ng l\u1edbn cacbonic t\u1eeb c\u00e1c nh\u00e0 m\u00e1y th\u1ea3i ra, h\u00e0m l\u01b0\u1ee3ng kh\u00ed cacbonic trong kh\u00f4ng kh\u00ed s\u1ebd kh\u00f4ng ng\u1eebng t\u0103ng l\u00ean.<\/p>\n\n\n\n
V\u00ed d\u1ee5 nh\u01b0 T\u00f4ky\u00f4, Nh\u1eadt B\u1ea3n, h\u00e0ng th\u00e1ng, 10 tri\u1ec7u d\u00e2n th\u1ea3i ra 350 ngh\u00ecn t\u1ea5n cacbonic, th\u00eam v\u00e0o \u0111\u00f3 l\u01b0\u1ee3ng cacbonic do \u0111\u1ed1t nhi\u00ean li\u1ec7u th\u1ea3i ra t\u1ed5ng c\u1ed9ng t\u1edbi 4 tri\u1ec7u t\u1ea5n cacbonic. Vi\u1ec7c kh\u00ed cacbonic t\u0103ng nh\u1ea5t \u0111\u1ecbnh s\u1ebd ti\u00eau hao l\u01b0\u1ee3ng l\u1edbn kh\u00ed \u00f4xi, nh\u01b0 T\u00f4ky\u00f4, l\u01b0\u1ee3ng \u00f4xi do \u0111\u1ed1t nhi\u00ean li\u1ec7u v\u00e0 h\u00f4 h\u1ea5p c\u1ee7a con ng\u01b0\u1eddi ti\u00eau hao m\u1ed7i th\u00e1ng l\u00e0 3,3 tri\u1ec7u t\u1ea5n, nh\u01b0 v\u1eady h\u00e0m l\u01b0\u1ee3ng \u00f4xi trong b\u1ea7u kh\u00f4ng kh\u00ed \u1edf T\u00f4ky\u00f4 gi\u1ea3m xu\u1ed1ng 2,7%. V\u00ec v\u1eady t\u1eebng xu\u1ea5t hi\u1ec7n t\u00ecnh tr\u1ea1ng ng\u01b0\u1eddi ta t\u00ecm mua b\u00ecnh d\u01b0\u1ee1ng kh\u00ed. Th\u1ef1c v\u1eadt trong qu\u00e1 tr\u00ecnh quang h\u1ee3p s\u1ebd h\u1ea5p th\u1ee5 kh\u00ed cacbonic trong kh\u00f4ng kh\u00ed \u0111\u1ed3ng th\u1eddi t\u1ea1o ra kh\u00ed \u00f4xi. V\u00ec v\u1eady th\u1ef1c v\u1eadt v\u1eeba l\u00e0 ng\u01b0\u1eddi ti\u00eau th\u1ee5 b\u1edbt cacbonic v\u1eeba l\u00e0 ng\u01b0\u1eddi t\u1ea1o ra kh\u00ed oxi, n\u00f3 c\u00f3 th\u1ec3 th\u00f4ng qua t\u00e1c d\u1ee5ng quang h\u1ee3p \u0111\u1ec3 kh\u00f4i ph\u1ee5c v\u00e0 duy tr\u00ec l\u01b0\u1ee3ng oxi v\u00e0 cacbonic trong kh\u00f4ng kh\u00ed c\u00e2n b\u1eb1ng. Th\u1ef1c v\u1eadt trong qu\u00e1 tr\u00ecnh t\u00e1c d\u1ee5ng quang h\u1ee3p, c\u1ee9 h\u1ea5p th\u1ee5 44 g cacbonic th\u00ec s\u1ebd t\u1ea1o ra 32 g oxi. M\u1eb7c d\u00f9 th\u1ef1c v\u1eadt th\u00f4ng qua qu\u00e1 tr\u00ecnh h\u00f4 h\u1ea5p, c\u0169ng ti\u00eau hao l\u01b0\u1ee3ng oxi nh\u1ea5t \u0111\u1ecbnh, nh\u01b0ng l\u01b0\u1ee3ng oxi t\u1ea1o ra trong qu\u00e1 tr\u00ecnh quang h\u1ee3p v\u00e0o ban ng\u00e0y so v\u1edbi s\u1ef1 ti\u00eau hao kh\u00ed oxi cho h\u00f4 h\u1ea5p v\u00e0o ban \u0111\u00eam g\u1ea5p 20 l\u1ea7n. Theo t\u00ednh to\u00e1n, m\u1ed7i m\u1ed9t hecta r\u1eebng h\u00e0ng ng\u00e0y c\u00f3 th\u1ec3 ti\u00eau hao m\u1ed9t t\u1ea5n cacbonic, th\u1ea3i ra 0,73 t\u1ea5n oxi, m\u1ed7i 1m2 th\u1ea3m c\u1ecf t\u01b0\u01a1i t\u1ed1t m\u1ed7i gi\u1edd ti\u00eau hao 15 g cacbonic (kho\u1ea3ng m\u1ed7i hecta l\u00e0 0,2 t\u1ea5n). N\u1ebfu m\u1ed9t ng\u01b0\u1eddi m\u1ed9t ng\u00e0y c\u1ea7n 0,75 kg oxi, th\u1ea3i ra 0,9 kg cacbonic th\u00ec trong th\u00e0nh ph\u1ed1 m\u1ed7i ng\u01b0\u1eddi c\u1ea7n 10m2 r\u1eebng ho\u1eb7c 50m2 th\u1ea3m c\u1ecf m\u1edbi c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u1ee7 l\u01b0\u1ee3ng oxi m\u00e0 con ng\u01b0\u1eddi c\u1ea7n cho h\u00f4 h\u1ea5p v\u00e0 ti\u00eau tr\u1eeb b\u1edbt cacbonic m\u00e0 con ng\u01b0\u1eddi th\u1ea3i ra. Th\u00eam v\u00e0o \u0111\u00f3 c\u1ea3 l\u01b0\u1ee3ng cacbonic th\u1ea3i ra do \u0111\u1ed1t nguy\u00ean li\u1ec7u, nh\u01b0 v\u1eady ch\u1ec9 c\u00f3 di\u1ec7n t\u00edch \u0111\u1ea5t xanh l\u1edbn th\u00ec m\u1edbi duy tr\u00ec s\u1ef1 c\u00e2n b\u1eb1ng v\u1ec1 oxi v\u00e0 cacbonic. T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y, c\u00f4ng t\u00e1c xanh h\u00f3a trong th\u00e0nh ph\u1ed1 l\u00e0 m\u1ed9t c\u00f4ng vi\u1ec7c r\u1ea5t quan tr\u1ecdng. Ng\u00e0y nay c\u00e1c th\u00e0nh ph\u1ed1 hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 coi vi\u1ec7c xanh h\u00f3a \u0111\u00f4 th\u1ecb l\u00e0 m\u1ed9t b\u1ed9 ph\u1eadn t\u1ed5 ch\u1ee9c quan tr\u1ecdng \u0111\u1ed3ng th\u1eddi coi t\u1ec9 l\u1ec7 gi\u1eefa di\u1ec7n t\u00edch \u0111\u1ea5t xanh h\u00f3a v\u00e0 t\u1ec9 l\u1ec7 d\u00e2n s\u1ed1 l\u00e0 m\u1ed9t ch\u1ec9 ti\u00eau \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 xanh h\u00f3a c\u1ee7a th\u00e0nh ph\u1ed1 hi\u1ec7n \u0111\u1ea1i v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng m\u00f4i tr\u01b0\u1eddng c\u1ee7a th\u00e0nh ph\u1ed1.<\/p>\n\n\n\n
Hi\u1ec7n nay t\u1ec9 l\u1ec7 di\u1ec7n t\u00edch \u0111\u1ea5t xanh h\u00f3a c\u1ee7a c\u00e1c qu\u1ed1c gia tr\u00ean th\u1ebf gi\u1edbi ch\u1ee7 y\u1ebfu g\u1ed3m Pari 22,8 m2, New York 19 m2, London 22,8 m2, Th\u01b0\u1ee3ng H\u1ea3i 3,5 m2, T\u00f4ki\u00f4 1,75 m2 (t\u00ednh theo \u0111\u1ea7u ng\u01b0\u1eddi).<\/p>\n","protected":false},"excerpt":{"rendered":"
Ch\u00fang ta bi\u1ebft r\u1eb1ng oxi l\u00e0 ch\u1ea5t c\u1ea7n thi\u1ebft cho s\u1ef1 s\u1ed1ng c\u00f2n c\u1ee7a lo\u00e0i ng\u01b0\u1eddi tr\u00ean \u0111\u1ecba c\u1ea7u. N\u1ebfu kh\u00f4ng c\u00f3 oxi \u0111\u1ea7y \u0111\u1ee7 con ng\u01b0\u1eddi s\u1ebd kh\u00f4ng th\u1ec3 sinh t\u1ed3n. Trong b\u1ea7u kh\u00ed quy\u1ec3n, h\u00e0m l\u01b0\u1ee3ng oxi l\u00e0 21%, h\u00e0m l\u01b0\u1ee3ng kh\u00ed cacbonic l\u00e0 0,032%. N\u1ebfu l\u01b0\u1ee3ng cacbon trong b\u1ea7u kh\u00ed quy\u1ec3n t\u0103ng […]<\/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":[15,19],"tags":[],"class_list":["post-9696","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9696","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=9696"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9696\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}