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
What can be said about the report by the National Academy of Sciences?
What can be said about the report by the National Academy of Sciences?
admin
2014-06-20
29
问题
What can be said about the report by the National Academy of Sciences?
W: Mr. Welch, do you think there is any doubt now that global warming exists?
M: Let me put it this way. A few determined skeptics don’t accept it, but the over-whelming majority of scientists do. The report the National Academy of Sciences issued was very balanced. They noticed some uncertainties , for example, when and where impacts might be felt and to what degree. But the conclusion was that the earth is warming. This change is induced by human activity and it will get worse.
W: Do a few degrees of warming really matter?
M: The earth is warmed by 1 degree Fahrenheit in the last 100 years, more in some places, like the Arctic, where there has been an increase of 4 to 5 degrees since the 1950s. Polar bears are having a terrible time there and may be extinct by the end of this century. Already, we are seeing changes in Alaska, where roads are buckling in places and some major pipelines no longer fit together. Cold water fish that used to be found off the Alaskan Coast are no longer there.
W: Can a new energy policy help?
M: Energy policy is climate policy since fossil fuels are the main sources of green-house gases, so the question becomes: Where do we get our energy? In the United States, 51% of electricity comes from coal, 20% nuclear, 16.5% natural gas, 7% hydroelectric, 3% oil and the rest, renewables, geothermal, wind, and solar.
W: How much power can we realistically expect to derive from renewable sources?
M: 10% by 2020 is realistic or with a considered effort, 30% by 2050. Without major breakthroughs, it’s hard to get beyond a third, because most renewables are intermittent. You need better ways of storing the energy.
选项
A、Lack of advanced storing technology.
B、A need for joint efforts of scientists.
C、A shortage of practical support from the public.
D、An unreliable market demand.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/ruXd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
PersonnelchangesattheInternationalMonetaryFundandproposalsforchangingthefundhavebeenreportedlately.Afteraleng
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Answerquestionsbyreferringtotheradioreportsonhotwavein2006summer.Note:Whenmorethanoneanswerisrequired,
theclimateaffectsthefuturesustainableagriculturaldevelopment?environmentalcontrolisrelatedwiththenationalrevenue
Asinternationalcommercegrows,thereisanamazingdevelopmentwhichisexpandingateverincreasingrate—businessontheInter
随机试题
阅读《秋水》中的一段文字,回答下列问题:人卒九州,谷食之所生,舟车之所通,人处一焉;此其比万物也,不似毫末之在马体乎?五帝之所连,三王之所争,仁人之所忧,任士之所劳,尽此矣。伯夷辞之以为名,仲尼语之以为博,此其自多也,不似尔向之自多于水乎?请
维生素是维持动物体正常生理代谢和机能所必需的一类低分子化合物,其作用是其他物质所无法替代的。可用于高热、重度损伤及牛酮血症、神经炎、心肌炎的辅助治疗的维生素为
关于建筑面积以下说法正确的是()。
下列关于招标控制价的说法不正确的是()。
下列属于成本类科目的是()。
真理的相对性应该理解为
Threepassions,simplebutoverwhelminglystrong,havegovernedmylife:thelongingforlove,thesearchforknowledge,andunb
对长度为n的线性表进行顺序查找,在最坏情况下所需要的比较次数为
Whereisthisconversationprobablytakingplace?
RecreationalrunnerCarrieJohnstonusuallydoesn’tfeelhungryafteragoodsweat.Exercise【C1】______Johnston’sappetite,bu
最新回复
(
0
)