首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automob
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automob
admin
2022-06-05
85
问题
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. At present, we realize that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil)is creating a "greenhouse effect"—conserving heat reflected from the earth and raising the world’s average temperature. If this view is correct and the world’s temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be in water.
Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth’s temperature—a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by experts in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.
Driven by economic profit, people neglect the damage on our environment caused by the " advanced civilization". Maybe the air pollution is the price the human beings have to pay for their development. But is it really worthwhile?
This passage is primarily about________.
选项
A、the greenhouse effect
B、the burning of fossil fuels
C、the potential effect of air pollution
D、the likelihood of a new ice age
答案
C
解析
文章是在讨论大气污染给人类带来的潜在影响。
转载请注明原文地址:https://kaotiyun.com/show/RJNd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Laborforceisdefinedasbeingthetotalnumberofpeoplewhoareavailabletoworkandearnincome.Thisdefinitionincludese
Astheconversationbegins,whatarethemanandwomandoing?
WhatisMr.Bush’smainpurposeofthetrip?
Scientistsfindthathard-workingpeoplelivelongerthanaveragemenandwomen.Careerwomenare【C1】______thanhousewives.Evid
Kelvin,oneofyourbestfriends,wonthescholarshipinYaleUniversity.Writealetterofcongratulationstohim,includingth
Whydidthemangiveupstudyingphysics?
WhatisMs.Bush’smainpurposeforthetrip?
Americanarchitectureisatitsbestwhenitisconcernedwithbuildingsthathaveapracticalpurpose.Factories,officebuildi
AnembarrassingexperienceItwasthesmallhoursofthemorningwhenwereachedLondonAirport.IhadcabledLondonfromAm
Whatdoesthetelegramsay?
随机试题
某企业2019年和2020年的营业净利率分别为6%和9%,总资产周转次数分别为2和1.5.两年的产权比率相同,与2019年相比,2020年的权益净利率变动趋势为()。
为企业分析竞争局面提供了清晰思路的是
自然科学属于现代生产力系统的要素,这是因为()
关于适度控制需要注意的问题,下列说法不正确的是()
垂体性侏儒症经兴奋实验后,GH峰值一般为
某厂一斜桥卷扬机选配电动机如图所示。有关机械技术参数:料车重G=3t,平衡重Gph=2t,料车卷筒半径r1=0.4m,平衡重卷筒半径r2=0.3m,斜桥倾角α=600,料车与斜桥面的摩擦系数μ=0.1,卷筒效率η=0.97。为确定卷扬机预选电动机功率
在流水施工参数中,施工过程、施工过程数属于( )参数。
InwhichofthefollowingactivitiesdoestheteachermainlyplaytheroleofaController?
TheestablishmentoftheThirdReichinfluencedeventsinAmericanhistorybystartingachainofeventswhichculminatedinwar
Marcellahas25pairsofshoes.Ifsheloses9individualshoes,whatisthegreatestnumberofmatchingpairsshecouldhavele
最新回复
(
0
)