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
70
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://kaotiyun.com/show/r9hi777K
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
Therearehiddenfactorswhichscientistscall"feedbackmechanisms".Nooneknowsquitehowtheywillinteractwiththechangin
Nuclearpower’sdangertohealth,safety,andevenlifeitselfcanbesummedupinoneword:radiation.Nuclearradiationha
Iamsorryforthe______toneinyourletter,butIfeelsurethatthingsarenotsobadwithyouasyousay.
Americansusuallyconsiderthemselvesafriendlypeople.Theirfriendships,however,tendtobeshorterandmorecasualthanfri
Amajorgoalofthestatetravelagencyisto______morepeopletovisititscountryattheturnofthecentury.
Nuclearpower,withallitsinherentproblems,isstilltheonlyoptiontoguaranteeenoughenergyinthefuture.
Differenceinpositionadoptedbyoxygenandhydrogenatomsaccountforvariationsinthecrystallinestructureofdifferentfor
Hisessayis______withmorethan120full-colorphotographsthatdepictthenationalparkinallseasons.
随机试题
在学校内建立一个校园网,我们不会将_______选作客户机。
颈静脉加压试验(压颈试验)阳性见于
能清肺胃之热的药物有
治疗铅中毒的首选药物是
资产支持证券承销机构应当具备的条件不包括()。
下列各项中,应该列入房地产开发成本的有()。
观察模仿榜样者呈现的行为,学习其社会行为,属于()。
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。
赵某因为涉嫌犯抢劫罪2005年1月1日被拘留,2005年4月1日被判处有期徒刑12年,附加剥夺政治权利3年,该判决2005年4月11日生效并被交付执行,赵某从什么时候开始将不享有政治权利?()
Incollaborationwithotherhealthpartners,anEarlyWarningSystemhasbeenestablished.Theunderlinedpartmeans______.
最新回复
(
0
)