首页
登录
职称英语
If pollution continues to increase at the present rate, formation of aerosol
If pollution continues to increase at the present rate, formation of aerosol
游客
2023-09-11
18
管理
问题
If pollution continues to increase at the present rate, formation of aerosols (悬浮微粒) in the atmosphere will cause the onset (开始) of an ice age in about fifty years’ time. This conclusion, reached by Dr. S. Rasool and Dr. H. Schneider of the United States Goddard Space Flight Centre, answers the apparently conflicting questions of whether an increase in the carbon dioxide content of the atmosphere will cause the Earth to warm up or increasing the aerosol content will cause it to cool down. The Americans have shown conclusively that the aerosol question is dominant.
Two specters haunting conservationists have been the prospect that environmental pollution might lead to the planet’s becoming unbearably hot or cold. One of these ghosts has now been laid, because it seems that even an increase in the amount of carbon dioxide in the atmosphere to eight times its present value will produce an increase in temperature of only 2℃. which would take place over several thousand years. But the other problem now looms larger than ever.
Aerosols are collections of small liquid or solid particles dispersed in air or some other medium. The particles are all so tiny that each is composed of only a few hundred atoms. Because of this they can float in the air for a very long time. Perhaps the most commonly experienced aerosol is industrial smog of the kind that plagued London in the 1950s and is an even greater problem in Los Angeles today. These collections of aerosols reflect the Sun’s heat and thereby cause the Earth to cool.
Dr. Rasool and Dr. Schneider have calculated the exact effect of a dust aerosol layer just above the Earth’s surface in the temperature of the planet. As the layer builds up, the present delicate balance between the amount of heat absorbed from the Sun and the amount radiated from the Earth is disturbed. The aerosol layer not only reflects much of the Sun’s light but also transmits the infrared radiation from below. So, while the heat input to the surface drops, the loss of heat remains high until the planet cools to a new balanced state.
Within fifty years, if no steps are taken to stop the spread of aerosols in the atmosphere, a cooling of the Earth by as much as 3.5℃ seems inevitable. If that lasts for only a few years it would start another ice age, and because the growing ice caps at each pole would themselves reflect much of the Sun’s radiation it would probably continue to develop even if the aerosol layer were destroyed.
The only bright spot in this gloomy forecast lies in the hope expressed by Dr. Rasool and Dr. Schneider that nuclear power may replace fossil fuels in time to prevent the aerosol content of the atmosphere from becoming critical. [br] What will happen if the dust aerosol layer develops?
选项
A、The earth will get extremely hot.
B、The balance between the amount of heat absorbed from the Sun and the amount lost could hardly be maintained.
C、The light of the Sun could no longer reach the surface of the Earth.
D、Infrared radiation could no longer be transmitted from the Earth to outer space.
答案
B
解析
细节题。根据第四段第二句,如果悬浮颗粒层堆积的话,会扰乱热量平衡。
转载请注明原文地址:https://tihaiku.com/zcyy/3003863.html
相关试题推荐
Theaboveexperimentshowsthatnotalltheinformationwhichisrecei
Theaboveexperimentshowsthatnotalltheinformationwhichisrecei
Theaboveexperimentshowsthatnotalltheinformationwhichisrecei
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
Airpollutionisoneofthemostpervasiveenvironmentalproblemsbecauseatm
随机试题
OneofthoserarelocalcreationsofAmerica,cowboypoetryhasalongandv
[originaltext]W:Youdon’tlooksmartthismorning.Icanseeyou’renothappy.
Insome【S1】______centers,workaholismissocommonthatpeopledonot【S2】___
下列选项属于常用的金属风管的是()。A.黑铁皮 B.白铁皮 C.铝板 D
适用于除掉旧的防腐层(漆膜)或带有油浸过的金属表面工程,不适用于薄壁的金属设备、
()是指债权人与债务人或债务人提供的第三人以协商订立书面合同的方式,移转债务
请根据《普通高中音乐课程标准(2017年版)》的基本理念,按照下列要求进行教学设
伦敦证券交易所按照层次的不同,可以分为( )。 ①主板市场 ②另类投资市场
护士对血栓闭塞性脉管炎患者进行健康教育,正确的内容是A.室内温度宜保持在15℃以
商业银行的操作风险不是由( )所引发的风险。A.人员及系统 B.无法满足客户
最新回复
(
0
)