{"id":9506,"date":"2021-11-21T16:49:26","date_gmt":"2021-11-21T09:49:26","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=9506"},"modified":"2021-11-21T18:37:51","modified_gmt":"2021-11-21T11:37:51","slug":"vi-sao-phai-han-che-va-loai-bo-rac-thai-vu-tru","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vi-sao-phai-han-che-va-loai-bo-rac-thai-vu-tru\/","title":{"rendered":"V\u00ec sao ph\u1ea3i h\u1ea1n ch\u1ebf v\u00e0 lo\u1ea1i b\u1ecf &#8220;r\u00e1c th\u1ea3i v\u0169 tr\u1ee5&#8221;?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">K\u1ec3 t\u1eeb ng\u00e0y 4\/10\/1957, Li\u00ean X\u00f4 c\u0169 ph\u00f3ng v\u1ec7 tinh nh\u00e2n t\u1ea1o \u0111\u1ea7u ti\u00ean \u0111\u1ebfn nay, lo\u00e0i ng\u01b0\u1eddi \u0111\u00e3 ph\u00f3ng v\u00e0o v\u0169 tr\u1ee5 h\u00e0ng v\u1ea1n v\u1ec7 tinh nh\u00e2n t\u1ea1o, t\u00e0u v\u0169 tr\u1ee5, m\u00e1y bay v\u0169 tr\u1ee5 v\u00e0 c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m v\u0169 tr\u1ee5. Trong s\u1ed1 nh\u1eefng thi\u00ean th\u1ec3 nh\u00e2n t\u1ea1o n\u00e0y, c\u00f3 m\u1ed9t s\u1ed1 v\u00ec g\u1eb7p s\u1ef1 c\u1ed1 m\u00e0 n\u1ed5 tung bi\u1ebfn th\u00e0nh c\u00e1c m\u1ea3nh v\u1ee5n; c\u00f3 m\u1ed9t s\u1ed1 h\u1ebft tu\u1ed5i th\u1ecd l\u00e0m vi\u1ec7c t\u1ef1 nhi\u00ean b\u1ecb \u0111\u00e0o th\u1ea3i, nh\u01b0ng nh\u1eefng thi\u00ean th\u1ec3 nh\u00e2n t\u1ea1o \u0111\u00f3 kh\u00f4ng m\u1ea5t \u0111i m\u00e0 tr\u1edf th\u00e0nh \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d, ch\u00fang bay l\u01a1 l\u1eedng quanh Tr\u00e1i \u0110\u1ea5t trong v\u0169 tr\u1ee5. \u0110\u1ebfn nay ng\u01b0\u1eddi ta \u0111\u00e3 \u0111o \u0111\u01b0\u1ee3c trong v\u0169 tr\u1ee5 c\u00f3 kho\u1ea3ng h\u01a1n 35 tri\u1ec7u m\u1ea3nh thi\u00ean th\u1ec3, trong \u0111\u00f3 nh\u1eefng m\u1ea3nh t\u01b0\u01a1ng \u0111\u1ed1i to c\u00f3 kho\u1ea3ng 17 ngh\u00ecn m\u1ea3nh. Ng\u00e0y nay \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d \u0111ang kh\u00f4ng ng\u1eebng t\u0103ng l\u00ean. Theo th\u1ed1ng k\u00ea c\u1ee7a c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">chuy\u00ean gia<\/a>, \u0111\u1ebfn n\u0103m 2000, \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d s\u1ebd t\u0103ng \u0111\u1ebfn h\u00e0ng v\u1ea1n t\u1ea5n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d n\u00e0y c\u00f9ng v\u1edbi v\u1ec7 tinh \u0111ang l\u00e0m vi\u1ec7c \u0111\u00eam ng\u00e0y quanh Tr\u00e1i \u0110\u1ea5t v\u1edbi t\u1ed1c \u0111\u1ed9 cao. Ch\u00fang s\u1ebd tr\u1edf th\u00e0nh nh\u1eefng m\u1ed1i nguy h\u1ea1i l\u1edbn c\u1ea3n tr\u1edf khai th\u00e1c kho\u1ea3ng kh\u00f4ng v\u0169 tr\u1ee5 c\u1ee7a lo\u00e0i ng\u01b0\u1eddi. V\u00ed d\u1ee5 \u1edf \u0111\u1ed9 cao c\u00e1ch m\u1eb7t \u0111\u1ea5t 2.000 km, m\u1ed9t b\u1ed9t kim lo\u1ea1i nh\u1ecf c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 0,5 mm, s\u1ee9c va \u0111\u1eadp c\u1ee7a n\u00f3 \u0111\u1ee7 \u0111\u1ec3 xuy\u00ean th\u1ee7ng qu\u1ea7n \u00e1o c\u1ee7a nh\u00e0 du h\u00e0nh v\u0169 tr\u1ee5 g\u00e2y ra t\u1eed vong; \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a m\u1ed9t m\u1ea9u nh\u00f4m kho\u1ea3ng 1 cm n\u1ebfu va \u0111\u1eadp v\u00e0o m\u00e1y bay v\u0169 tr\u1ee5 th\u00ec s\u1ee9c m\u1ea1nh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi hai xe \u00f4 t\u00f4 \u0111\u00e2m v\u00e0o nhau, khi\u1ebfn cho m\u00e1y bay \u0111\u00f3 h\u01b0 h\u1ecfng ho\u00e0n to\u00e0n; cho d\u00f9 l\u00e0 m\u1ed9t m\u1ea3nh s\u01a1n c\u1ee7a v\u1ec7 tinh bong ra c\u0169ng \u0111\u1ee7 \u0111\u1ec3 xuy\u00ean th\u1ee7ng con t\u00e0u v\u1ec7 tinh nh\u00e2n t\u1ea1o. N\u0103m 1991 m\u00e1y bay v\u0169 tr\u1ee5 c\u1ee7a M\u1ef9 \u0111\u1ec3 tr\u00e1nh va ch\u1ea1m v\u1edbi con t\u00e0u v\u0169 tr\u1ee5 \u0111\u00e3 b\u1ecf \u0111i \u0111ang bay l\u01a1 l\u1eedng trong kh\u00f4ng trung \u0111\u00e0nh ph\u1ea3i thay \u0111\u1ed5i qu\u1ef9 \u0111\u1ea1o bay ban \u0111\u1ea7u. Ngo\u00e0i ra, \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d c\u00f2n c\u00f3 th\u1ec3 t\u00e1n x\u1ea1 c\u00e1c lo\u1ea1i tia s\u00e1ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00f4ng t\u00e1c quan s\u00e1t thi\u00ean v\u0103n v\u0169 tr\u1ee5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d ng\u00e0y c\u00e0ng t\u0103ng, c\u00e1c nh\u00e0 khoa h\u1ecdc v\u0169 tr\u1ee5 c\u1ee7a c\u00e1c n\u01b0\u1edbc \u0111ang t\u00ecm c\u00e1ch \u0111\u1ec3 kh\u1ed1ng ch\u1ebf v\u00e0 lo\u1ea1i b\u1ecf ch\u00fang. \u0110\u1ec1 t\u00e0i m\u00e0 h\u1ecd nghi\u00ean c\u1ee9u l\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 thu h\u1ed3i \u0111\u01b0\u1ee3c c\u00e1c v\u1ec7 tinh theo th\u1eddi gian \u0111\u00e3 \u0111\u1ecbnh, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u00e0o th\u1ea3i t\u00e0n d\u01b0 c\u1ee7a ch\u1ea5t \u0111\u1ed1t t\u00ean l\u1eeda m\u1ed9t c\u00e1ch c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1eb1m tr\u00e1nh nh\u1eefng v\u1ee5 n\u1ed5 g\u00e2y ra nh\u1eefng m\u1ea3nh v\u1ee5n trong v\u0169 tr\u1ee5, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 thu gom nh\u1eefng m\u1ea3nh kim lo\u1ea1i nh\u1ecf trong v\u0169 tr\u1ee5, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e2y d\u1ef1ng tr\u1ea1m \u201cr\u00e1c th\u1ea3i v\u0169 tr\u1ee5\u201d, t\u1eadp trung c\u00e1c m\u1ea3nh t\u00e0n d\u01b0 thi\u00ean th\u1ec3 l\u1ea1i v\u1edbi nhau v.v..<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: R\u00e1c th\u1ea3i v\u0169 tr\u1ee5; V\u1ec7 tinh nh\u00e2n t\u1ea1o.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K\u1ec3 t\u1eeb ng\u00e0y 4\/10\/1957, Li\u00ean X\u00f4 c\u0169 ph\u00f3ng v\u1ec7 tinh nh\u00e2n t\u1ea1o \u0111\u1ea7u ti\u00ean \u0111\u1ebfn nay, lo\u00e0i ng\u01b0\u1eddi \u0111\u00e3 ph\u00f3ng v\u00e0o v\u0169 tr\u1ee5 h\u00e0ng v\u1ea1n v\u1ec7 tinh nh\u00e2n t\u1ea1o, t\u00e0u v\u0169 tr\u1ee5, m\u00e1y bay v\u0169 tr\u1ee5 v\u00e0 c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m v\u0169 tr\u1ee5. Trong s\u1ed1 nh\u1eefng thi\u00ean th\u1ec3 nh\u00e2n t\u1ea1o n\u00e0y, c\u00f3 m\u1ed9t s\u1ed1 v\u00ec [&hellip;]<\/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-9506","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\/9506","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=9506"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9506\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}