Los Angeles l\u00e0 th\u00e0nh ph\u1ed1 l\u1edbn th\u1ee9 ba c\u1ee7a M\u1ef9. T\u1eeb nh\u1eefng n\u0103m 40 c\u1ee7a th\u1ebf k\u1ec9 XX, th\u00e0nh ph\u1ed1 n\u00e0y \u0111\u00e3 c\u00f3 2,5 tri\u1ec7u \u00f4 t\u00f4. L\u00e0 th\u00e0nh ph\u1ed1 gi\u00e1p bi\u1ec3n, ba m\u1eb7t l\u00e0 n\u00fai bao b\u1ecdc n\u00ean kh\u00f4ng kh\u00ed kh\u00f3 l\u01b0u th\u00f4ng, do \u0111\u00f3 ph\u1ea7n l\u1edbn kh\u00ed \u00f4 t\u00f4 th\u1ea3i ra gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e1i l\u1ed3ng \u00fap l\u00ean th\u00e0nh ph\u1ed1.<\/p>\n\n\n\n
Khi d\u00f9ng x\u0103ng \u0111\u1ec3 ch\u1ea1y \u00f4 t\u00f4, kh\u00ed th\u1ea3i ra ch\u1ee9a c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a sunfur\u01a1, CO2 v\u00e0 nit\u01a1r\u01a1 c\u00f9ng v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t cacbuahi\u0111ro. D\u01b0\u1edbi tia t\u1eed ngo\u1ea1i c\u1ee7a \u00e1nh n\u1eafng m\u1ea1nh, hai lo\u1ea1i kh\u00ed cu\u1ed1i c\u00f9ng s\u1ebd x\u1ea3y ra h\u00e0ng lo\u1ea1t ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, sinh ra m\u1ed9t lo\u1ea1i s\u01b0\u01a1ng m\u00f9 m\u00e0u xanh lam nh\u1ea1t, g\u1ed3m c\u00e1c ch\u1ea5t kh\u00ed \u00f4z\u00f4n, an\u0111ehit t\u1ea1o th\u00e0nh, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc. N\u1ed3ng \u0111\u1ed9 c\u1ee7a s\u01b0\u01a1ng m\u00f9 n\u00e0y ch\u1ec9 c\u1ea7n \u0111\u1ea1t \u0111\u1ebfn m\u1ea5y ph\u1ea7n tri\u1ec7u l\u00e0 \u0111\u00e3 k\u00edch th\u00edch r\u1ea5t m\u1ea1nh \u0111\u1ed1i v\u1edbi m\u1eaft, g\u00e2y \u0111au \u0111\u1ea7u, kh\u00f3 th\u1edf, th\u1eadm ch\u00ed h\u00f4n m\u00ea. N\u1ebfu ch\u00fang k\u1ebft h\u1ee3p v\u1edbi s\u01b0\u01a1ng m\u00f9 axit sunfuric do kh\u00ed sunfur\u01a1 t\u1ea1o n\u00ean g\u00e2y \u00f4 nhi\u1ec5m th\u00ec \u0111\u1ed9 \u0111\u1ed9c v\u00e0 t\u00ednh nguy h\u1ea1i c\u00e0ng l\u1edbn h\u01a1n.<\/p>\n\n\n\n
Th\u00e1ng 9 n\u0103m 1955, do b\u1ecb \u00f4 nhi\u1ec5m nghi\u00eam tr\u1ecdng kh\u00ed th\u1ea3i \u00f4 t\u00f4, c\u1ed9ng v\u1edbi nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed h\u01a1i cao, n\u1ed3ng \u0111\u1ed9 kh\u00f3i m\u00f9 quang h\u00f3a h\u1ecdc \u1edf th\u00e0nh ph\u1ed1 Los Angeles \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn 6,5 ph\u1ea7n tri\u1ec7u. K\u1ebft qu\u1ea3 trong hai ng\u00e0y \u0111\u00e3 c\u00f3 h\u01a1n 400 c\u1ee5 gi\u00e0 tr\u00ean 65 tu\u1ed5i b\u1ecb ch\u1ebft, cao g\u1ea5p 3 l\u1ea7n so v\u1edbi b\u00ecnh th\u01b0\u1eddng. \u0110\u00f3 l\u00e0 s\u1ef1 ki\u1ec7n s\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc n\u1ed5i ti\u1ebfng \u1edf th\u00e0nh ph\u1ed1 Los Angeles.<\/p>\n\n\n\n
S\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc ngo\u00e0i c\u00f3 h\u1ea1i cho s\u1ee9c kh\u1ecfe con ng\u01b0\u1eddi, c\u00f2n g\u00e2y n\u00ean b\u1ec7nh t\u1eadt cho gia c\u1ea7m, gia s\u00fac v\u00e0 hoa m\u00e0u, khi\u1ebfn c\u00e1c ch\u1ebf ph\u1ea9m cao su b\u1ecb l\u00e3o h\u00f3a, l\u00e0m cho c\u00e1c c\u00f4ng tr\u00ecnh ki\u1ebfn tr\u00fac v\u00e0 m\u00e1y m\u00f3c b\u1ecb hoen g\u1ec9. Trong th\u1eddi gian th\u00e0nh ph\u1ed1 Los Angeles b\u1ecb s\u01b0\u01a1ng m\u00f9, v\u00f9ng rau \u1edf ngo\u1ea1i \u00f4 t\u1eeb m\u00e0u xanh bi\u1ebfn th\u00e0nh m\u00e0u n\u00e2u, kh\u00f4ng ai d\u00e1m \u0103n, s\u1ea3n l\u01b0\u1ee3ng hoa qu\u1ea3 v\u00e0 c\u00e1c n\u00f4ng s\u1ea3n kh\u00e1c gi\u1ea3m th\u1ea5p, h\u00e0ng lo\u1ea1t c\u00e2y c\u1ed1i l\u00e1 xanh bi\u1ebfn th\u00e0nh m\u00e0u v\u00e0ng, 1\/4 c\u00e1nh r\u1eebng h\u00e0ng v\u1ea1n m\u1eabu do c\u00e0nh l\u00e1 b\u1ecb kh\u00f4 h\u00e9o m\u00e0 ch\u1ebft.<\/p>\n\n\n\n
C\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p v\u00e0 s\u1ed1 l\u01b0\u1ee3ng \u00f4 t\u00f4 t\u0103ng l\u00ean, nhi\u1ec1u th\u00e0nh ph\u1ed1 tr\u00ean th\u1ebf gi\u1edbi c\u0169ng \u0111\u00e3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng s\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n\n\n
Hi\u1ec7n t\u01b0\u1ee3ng s\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc \u0111\u00e3 l\u00e0m cho m\u1ecdi ng\u01b0\u1eddi ph\u1ea3i quan t\u00e2m. Ng\u00e0y nay tr\u00ean th\u1ebf gi\u1edbi c\u00f3 kh\u00f4ng \u00edt th\u00e0nh ph\u1ed1 \u0111\u1eb7t nh\u1eefng thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng chuy\u00ean d\u1ee5ng, c\u00f3 th\u1ec3 \u0111o t\u00ecnh tr\u1ea1ng \u00f4 nhi\u1ec5m c\u1ee7a kh\u00f4ng kh\u00ed v\u00e0 t\u00ecnh h\u00ecnh kh\u00ed t\u01b0\u1ee3ng b\u1ea5t c\u1ee9 l\u00fac n\u00e0o, \u0111\u1ec3 khi c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 t\u00ecm ra bi\u1ec7n ph\u00e1p ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng s\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc ph\u00e1t sinh.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: S\u01b0\u01a1ng m\u00f9 quang h\u00f3a h\u1ecdc.<\/p>\n","protected":false},"excerpt":{"rendered":"
Los Angeles l\u00e0 th\u00e0nh ph\u1ed1 l\u1edbn th\u1ee9 ba c\u1ee7a M\u1ef9. T\u1eeb nh\u1eefng n\u0103m 40 c\u1ee7a th\u1ebf k\u1ec9 XX, th\u00e0nh ph\u1ed1 n\u00e0y \u0111\u00e3 c\u00f3 2,5 tri\u1ec7u \u00f4 t\u00f4. L\u00e0 th\u00e0nh ph\u1ed1 gi\u00e1p bi\u1ec3n, ba m\u1eb7t l\u00e0 n\u00fai bao b\u1ecdc n\u00ean kh\u00f4ng kh\u00ed kh\u00f3 l\u01b0u th\u00f4ng, do \u0111\u00f3 ph\u1ea7n l\u1edbn kh\u00ed \u00f4 t\u00f4 th\u1ea3i ra gi\u1ed1ng nh\u01b0 […]<\/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":[15,17],"tags":[],"class_list":["post-9346","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-moi-truong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9346","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=9346"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9346\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}