首页
登录
职称英语
[originaltext] Scientists in the United States have reported some good news
[originaltext] Scientists in the United States have reported some good news
游客
2024-06-09
12
管理
问题
Scientists in the United States have reported some good news about the ozone in the atmosphere. Recent findings suggest that the destruction of ozone by pollution is slowing. Ozone is a form of oxygen. Its presence above Earth protects us from radiation from the sun.
In one study, researchers examined information gathered by NASA space agency satellites and by equipment on Earth and said the atmosphere was losing about eight percent of the ozone layer per ten- year period since the late 1970s. In the last five years, though, that rate of loss has dropped by half. The atmosphere should start to gain ozone before long. A full recovery, however, is about 50 years away, as long as the Montreal Protocol remains in place.
That is an international treaty from 1987 to restore the ozone layer. The treaty restricts the use of a number of chemicals that destroy ozone, like chlorofiuorocarbons, or C-F-C’s. Wide use of C-F-C’s began in the 1930s. They became popular coolants in devices such as refrigerators and air conditioners. C-F-C’s remain in the atmosphere for years.
The Montreal Protocol also restricts the use of methyl bromide, a chemical to kill insects. Farmers and shippers are the main users. Natural sources of methyl bromide include oceans and some plants. Scientists say the bromine gas it produces is 50 times more destructive to ozone than chlorine gas from C-F-C’s.
选项
A、To restore our atmosphere.
B、To stop refrigerator-use.
C、To prevent people from killing insects.
D、To restrict the use of some pollutants that harm the ozone layer.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3627126.html
相关试题推荐
[originaltext]EmilyDickinsonisoneofthegreatestAmericanpoets.Shewa
[originaltext]EmilyDickinsonisoneofthegreatestAmericanpoets.Shewa
[originaltext]EmilyDickinsonisoneofthegreatestAmericanpoets.Shewa
[originaltext]M:Sincesomanyofyouhaveaskedmehowtolearnalanguage,I
[originaltext]M:Sincesomanyofyouhaveaskedmehowtolearnalanguage,I
[originaltext]M:Sincesomanyofyouhaveaskedmehowtolearnalanguage,I
[originaltext]M:WhatdoyouthinkofthecampusNetwork?W:Ithinkitstilln
[originaltext]M:WhatdoyouthinkofthecampusNetwork?W:Ithinkitstilln
[originaltext]M:WhatdoyouthinkofthecampusNetwork?W:Ithinkitstilln
[originaltext]Whatkindofcarwillwebedrivingbytheyear20107Itmay
随机试题
Thelandofapplepieandbaseball—theUnitedStatesofAmerica.Ofcourse
[originaltext]ThebiggestU.S.airstrikesagainstIraqthisyearhavefaile
[originaltext]Interviewer(W)GabeSaglie(M)Now,listentoPartOneofthei
[originaltext]Howmucharethefruits?[/originaltext]A、Idon’tlikeit.B、Fifty
下列关于储蓄存款利息的计算的说法,错误的是()。A.计算存期采用算头不算尾的办
下列哪项不是肿瘤的转移途径()A.血道转移 B.远位转移 C.淋巴道转
掌握知识是发展智力的______。
患者男性,40岁,因颅内压增高、脑疝行脑室外引流术。术后3h,护士发现脑室引流管
(2017年真题)根据《中华人民共和国反洗钱法》的规定,下列关于客户身份识别的表
驾驶员驾驶机动车上道路行驶,下列情形中,违反《道路交通安全法》的有()A:没有正
最新回复
(
0
)