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
Coal is expected to continue to account for almost 27 percent of the world’s energy needs. With growing international awareness
Coal is expected to continue to account for almost 27 percent of the world’s energy needs. With growing international awareness
admin
2012-10-20
77
问题
Coal is expected to continue to account for almost 27 percent of the world’s energy needs. With growing international awareness of pressures on the environment and the need to achieve sustainable development of energy resources, a wide range of pollution control practices is in place at most modem mines. In addition, major research and development programmers are being devoted to lifting efficiencies and reducing emissions of greenhouse gases during coal consumption. Such measures are helping coal to maintain its status as a major supplier of the world’s energy needs.
The coal industry has been targeted by its critics as a significant contributor to the greenhouse effect. However, the greenhouse effect is a natural phenomenon involving the increase in global surface temperature due to the presence of greenhouse gases—water vapor, carbon dioxide, methane and nitrous oxide--in the atmosphere. Without the greenhouse effect, the earth’s average surface temperature would be 33-35℃ lower, or -15℃. Life on earth, as we know it today, would not be possible.
There is concern that this natural phenomenon is being altered by a greater build-up of gases from human activity, perhaps giving rise to additional warming and changes in the earth’ s climate. This additional build-up and its forecast outcome has been called the enhanced greenhouse effect. Considerable uncertainty exists, however, about the enhanced greenhouse effect, particularly in relation to the extent and timing of any future increases in global temperature.
Greenhouse gases arise from a wide range of sources and their increasing concentration is largely related to the compound effects of increased population, improved living standards and changes in lifestyle. From a current base of 5 billion, the United Nations predicts that the global population may stabilize in the twenty-first century between 8 and 14 billion, with more than 90 percent of the projected increase taking place in the
world’s developing nations. The associated activities to support that growth, particularly to produce the required energy and food, will cause further increases in greenhouse gas emissions. The challenge, therefore, is to attain a sustainable balance between population, economic growth and the environment.
The major greenhouse gas emissions from human activities are carbon dioxide (CO2), methane and njtrous oxide. Chlorofiuorocarbons (CFCs) are the only major contributor to the greenhouse effect that does not occur naturally, coming from such sources as refrigeration, plastics and manufacture. Coal’s total contribution to greenhouse gas emissions is thought to be about 18 percent, with about half of this coming from electricity generation.
CFC emissions have been______.
选项
A、substantially reduced in recent years.
B、caused by natural human activities.
C、the only major contributor to the greenhouse effect.
D、generated from refrigeration, plastics and manufacture.
答案
D
解析
细节理解题。对应原文最后一段:Chlorofluorocarbons (CFCs) are the only major contributor to the greenhouse effect that does not occur naturally, coming from such sources as refrigeration, plastics and manufacture.答案为D。 occur vi. 发生
转载请注明原文地址:https://www.kaotiyun.com/show/fQhK777K
0
专业英语四级
相关试题推荐
Whydoadultsbelievethatalcoholicawarenessprogramsteachyoungpeoplenottoover-drink?Recently,readinganarticleabout
Disneyland,Knott’sBerryFarm,MagicMountain,theStateFair,amusementpark…allofthesearegreatfamilydestinations,yett
FlatswerealmostunknowninBritainuntilthe1850swhentheyweredeveloped,alongwithotherindustrialdwellings,forthela
WhichofthefollowingisNOTinthesixArabcountriesconductingapublicopinionpoll?
AccordingtoRogerNoriega,theturbulentperiodinLatinAmericanwascausedby______.
TheCarnegieFoundationreportsaysthatmanycollegeshavetriedtobe"allthingstoallpeople."Indoingso,theyhaveincre
TheofficiallogooftheInformationAwarenessOffice,thePentagon’ssecretivenewterrorist-detectionexperiment,isn’tsubtle
Mysister’sprofessorhadher______herpapermanytimesbeforeallowinghertopresentittothecommittee.
WhichofthefollowingstatementsdoesnottrulydescribeAlCastellano?
Violinprodigies,Ilearned,havecomeindistinctwavesfromdistinctregions.Mostofthegreatperformersofthelate19than
随机试题
根据下列材料,回答下列问题。(2020年临沂)李老师是八(3)班的历史老师,为了讲好“隋朝的灭亡”这一教学内容,李老师做了如下教学设计:首先,从电视剧《隋唐演义》中精选了一个与教学内容密切相关且学生熟悉的短视频引入课堂教学;然后带领学生简略地回顾了隋朝的
《突发公共卫生事件应急条例》规定,医疗卫生机构应当对传染病做到()
()是对会计对象进行的基本分类,是会计核算对象的具体化。
某贸易公司(增值税一般纳税人)2015年10月25日从外地某钢铁厂(增值税一般纳税人)购进罗纹钢一批,钢铁厂于当日开具增值税专用发票并将发票联和抵扣联交给贸易公司业务人员。2015年11月4日贸易公司业务人员在返程途中将增值税专用发票的发票联和抵扣联丢失。
以美国的学制为蓝本,一直沿用到全国解放初期的现代学制是()。
“商品差价”,是指同一商品由于流通环节、购销地区、购销季节以及质量不同而形成的价格差额。下列不属于商品差价的是()。
下列选项中,不属于必须由国务院审批的行政区划变更事项的是()。
某汉字的常用机内码是B6ABH,则它的国标码第一字节是
Nowadays,manypeopleusecomputerstohandleordinaryissuessuchasbankingandofficework,andtospendtheirsparetimeon
Byalmostanymeasure,thereisaboominInternet-basedinstruction.Injustafewyears,34percentofAmericanuniversitiesh
最新回复
(
0
)