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
考研
There are hidden factors which scientists call "feedback mechanisms" . No one knows quite how they will interact with the changi
There are hidden factors which scientists call "feedback mechanisms" . No one knows quite how they will interact with the changi
admin
2013-01-30
24
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 trees would soon lead to massive forest fires, releasing tons of C02 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" effect 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 C02 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.
It can be inferred from the passage that_____.
选项
A、the developing world has decided to increase its energy consumption
B、a third-world citizen adds less than a ton of C02 yearly to the atmosphere
C、the world climate would soon gain its balance if we stopped greenhouse gas emissions
D、future prosperity of the world is dependent on cheap fossil fuels
答案
B
解析
文章最后一段第三句话说“The average rich-world resident adds about 3.2 tons of CO2 yearly to the atmosphere,more than four times the level added by each Third World citizen.”,这说明B正确。文中没有提到A;C和D与文章的意思不符。
转载请注明原文地址:https://jikaoti.com/ti/VHOjFFFM
0
在职申硕(同等学力)英语
相关试题推荐
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】______theturnofthecenturywhenjazz(爵士乐)wasborn,Am
Insomeways,theUnitedStateshasmadespectacularprogress.Firesnolongerdestroy18,000buildingsastheydidintheGreat
Revengeisoneofthosethingsthateveryoneenjoys.Peopledon’tliketotalkaboutit,though.Justthesame,thereisnothing
Thesentence"mostofthebestthingshavealreadybeenlocated"couldmean______.JohnHorgan______.Ⅰ.haspublishedabooke
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,therefore,thechoiceofan【B1】______shouldbemad
Woman:Now,Richard,wouldyoucaretoexplainhowtheanswerstothetestquestionsappearedonyourdesk?Man:Ican’t,Profes
Accordingtosociologists,thereareseveraldifferentwaysinwhichapersonmaybecomerecognizedastheleaderofasocialgr
A:Whatflowersdoyougrowinyourgarden?B:______
Gravityisaslipperybeast.Wedon’tknowhowstrongitis,howitworksorhowfastitseffectsmove.Butthisyearwemadepr
Gravityisaslipperybeast.Wedon’tknowhowstrongitis,howitworksorhowfastitseffectsmove.Butthisyearwemadepr
随机试题
春且住!见说道、天涯芳草无归路。见说:
函数F(x)=∫0xt2(t-1)dt的极小值点x为________.
动脉血H+浓度升高主要通过外周化学感受器兴奋呼吸,其主要原因是
女,30岁。5年前右颈部触及花生米大小的肿块,随吞咽活动,无不适,近半年来增大明显且有声嘶。检查:甲状腺右叶有一直径2cm的肿块,无压痛,质硬,左叶不大。B超示右甲状腺单结节、边界欠清、血流丰富、内有强光点,右颈淋巴结肿大。测血T3、T4、TSH值正常,T
急性感染性多发性神经炎病人的治疗及护理哪项是错的
以下说法正确的是()。
下列关于甲股份有限公司成立、增发股份、合并的说法中,符合《公司法》规定的是()。(2014年)
一般模块的内聚性分为7种类型,其中内聚性最强的是()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
Howmenfirstlearnedtoinventwordsis(31);inotherwords,theoriginoflanguageisamystery.Allwereallyknowisthatm
最新回复
(
0
)