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 are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changin
There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changin
admin
2015-01-09
54
问题
There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changing climate. Here’s one example:plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade,vegetation may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometers a year—faster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1,000-kilometer-wide strip of forest running through Canada,Russia,and Scandinavia could be cut by half. Millions of dying tress would soon lead to massive forest fires, releasing tons of CO
2
and further boosting global warming.
There are dozens of other possible "feedback mechanisms". Higher temperatures will fuel condensation and increase cloudiness, which may actually damp down global warming. Others,like the"albedo"ef-fect is the amount of solar energy reflected by the earth’s surface. As northern ice and snow melts and the darker sea and land pokes through,more heat will be absorbed,adding to the global temperature increase. Even if we were to magically stop all greenhouse-gas emissions tomorrow,the impact on global climate would continue for decades. Delay will simply make the problem worse. The fact is that some of us are doing quite well the way things are. In the developed world prosperity has been built on 150 years of cheap fossil fuels.
Material progress has been linked to energy consumption. Today 75 percent of all the world’s energy is consumed by a quarter of the world’s population. The average rich-world resident adds about 3.2 tons of CO
2
yearly to the atmosphere,more than four times the level added by each Third World citizen. The US,with just seven percent of the global population,is responsible for 22 percent of global warming.
We can learn from the passage that____.
选项
A、some feedback mechanisms may slow down global warming
B、the basic facts of global warming are unknown
C、developing countries benefit from cheap fossil fuels
D、developed countries have decided to reduce their energy consumption
答案
A
解析
归纳题。第二段第二句话说“Higher temperatures will fuel condensation and increase cloudi—ness,which may actually damp down(阻碍)global warming.”这与A符合。B、C和D都与文章的意思相反。
转载请注明原文地址:https://kaotiyun.com/show/fMQO777K
0
考博英语
相关试题推荐
Change—ortheabilitytoadaptoneselftoachangingenvironment—isessentialtoevolution.Thefarmerwhoselandisrequiredfo
Change—ortheabilitytoadaptoneselftoachangingenvironment—isessentialtoevolution.Thefarmerwhoselandisrequiredfo
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthepastcentury,theglobalaveragesurfacetemperatur
TheclimateofEarthischanging.Climatologistsareconfidentthatoverthepastcentury,theglobalaveragesurfacetemperatur
(1)SiliconValleyisamagnettowhichnumeroustalentedengineers,scientistsandentrepreneursfromoverseasflockinsearcho
Thecollaborationamongscientists,universitiesandindustryisnotnew.Boththeuniversityadministrationandtheindustrypl
随机试题
各项电气工作应严格执行“________、________、________、________”的规定。
二类用地对城市设施或工程项目的布置有一定的限制。其具体情况是()。
对外国人(含无国籍人)可以实行收容教育,但是应当依照有关法律、法规严格进行。()
“吾貌虽瘦”在文中所论述的意思是______。“吾貌虽瘦,天下必肥”这句话个中的真善美的确意味深长。下列表现真善美内涵的一项是______。
请根据标准书号校验码的技术说明,将图5-13和图5-14程序流程图中(1)~(4)空缺处的内容填补完整。图5-13(或图5-14)中Mod(S,11)表示S除以11得到的余数。以下[C程序]实现不使用求余计算符号“%”,求取被除数p和除数q之间的余数。
下列叙述中,正确的说法是
HowtoGetalongWellwithYourBoss1.Beforeyouarguewithyourboss,checkwiththeboss’ssecretarytodeterminehismood
"Intelligence"atbestisanassumptiveconstruct—theword’smeaninghasneverbeenclear.【61】Thereismoreagreementont
•Lookatthenotesbelow.•Youwillhearawomantelephoningaboutarecruitmentdrive.•star?neededduetogrowthin(9)...
A、Relationsamongstate.B、Relationsamongsocieties.C、Relationsamongindividuals.D、Relationsamongeconomy.C对于宏观社会学家作者提到:…w
最新回复
(
0
)