首页
登录
职称英语
Coal is expected to continue to account for almost 27 percent of the world’
Coal is expected to continue to account for almost 27 percent of the world’
游客
2023-11-15
19
管理
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. [br] The proportion of all greenhouse gases created by coal is approximately ______
选项
A、14 percent
B、18 percent
C、27 percent
D、90 percent
答案
B
解析
细节理解题。对应原文最后一段:Coal’s total contribution to greenhouse gas emissions is thought to be aleut IB percent, with about half of this coming from electricity genem fion.答案为B。 contribution n,贡献 generation n.生成,发生,衍生
转载请注明原文地址:https://tihaiku.com/zcyy/3188157.html
相关试题推荐
WhataccountsforthegreatoutburstofmajorinventionsinearlyAmerica-
WhataccountsforthegreatoutburstofmajorinventionsinearlyAmerica-
______,sheledalifeofcompleteseclusion,andalmostisolatedfromtheoutsi
Caraccountfor______thegreenhousegasesintheUS.[br][originaltext]
Caraccountfor______thegreenhousegasesintheUS.[originaltext]Carsa
Languageswillcontinuetodiverge.EvenifEnglishweretobecometheuniv
Languageswillcontinuetodiverge.EvenifEnglishweretobecometheuniv
Crimeplaguesoursociety,almostallaroundusinourdailylives.Dailywe
Crimeplaguesoursociety,almostallaroundusinourdailylives.Dailywe
Crimeplaguesoursociety,almostallaroundusinourdailylives.Dailywe
随机试题
A.attemptB.chargedC.crucialD.delicateE.essentiallyF.eventually
A--skincareB--sunscreen/sunblockC--whitening
TherearemanyreasonswhyfamilylifeinBritainhaschangedsomuchinthe
TherighttopursuehappinessispromisedtoAmericansbytheUSConstitutio
[originaltext]W:Welcome,Mr.Johnson.Takeascat,please.Ourmanagerwillbe
舆论的正面效应主要有促进民主政治作用和()。A.引导群众作用 B.提供娱乐作
A.停止手术,给予缩宫素和抗生素 B.静脉注射阿托品1mg C.全身抗生素治
保证银行稳健经营、安全运行的核心指标是()。A:核心资本B:资本充足率C:附
资金结构指企业()和债务资金的比例关系。A.权益资金 B.财务资金 C.分配
利率是各国调整国民经济的杠杆之一,下列说法正确的有()。A.利率随社会平均利润
最新回复
(
0
)