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
Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus o
Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus o
admin
2015-07-31
59
问题
Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus on climate policy have played down the role of pollutants such as black carbon that stay in the atmosphere for a short time and concentrated on carbon dioxide, which, once generated, tends to remain there. That may soon change.
A new study concluded that the soot was the second-most-damaging greenhouse agent after CO
2
and about twice as bad for the climate as had been thought until now. The implications are profound. It found that the black carbon around at the moment has a warming effect of about 1.1 w/m
2
. This is greater than that of methane(甲烷)and second only to the 1. 7 w/m
2
of carbon dioxide.
Black carbon is especially damaging to frozen regions, because when soot falls on snow and ice it increases the amount of light and heat they absorb. The new assessment may therefore help explain why the Arctic has been melting faster than anyone had expected. The study argues that warming is likely to be especially marked in the high latitudes of the northern hemisphere— northern Canada, Alaska, northern Europe and Siberia. It also gives a warning that black carbon, by changing regional precipitation(降水)patterns, may affect Asian monsoons(季风).
The biggest impact of soot, though, is not on the climate but on health—through lung and other diseases. A study reckoned that controlling emissions of black carbon could save 2.4 million lives a year, regardless of any effects on the climate.
It might seem that the new study is one more item of bad environmental news. Not so. It should be easier to deal with black carbon than with CO
2
. Whereas CO
2
is long-lasting and an inevitable by-product of burning fossil fuels, soot drops out of the atmosphere within weeks. Stop putting it there and it will rapidly go away—a potentially easy win. Dealing with them is also cheaper than cutting CO
2
emissions and does not need global agreement, because the local benefits would be the main point, so no one could free-ride on the emission-cutting efforts of others. Instead, the good of the climate would be free-riding on local self-interest.
What does the word "free-ride" really mean in the last paragraph?
选项
A、Getting to certain place without paying the fee.
B、Gaining benefits without doing any efforts.
C、Giving somebody a free ride.
D、Driving a car in one’s own power.
答案
B
解析
推理判断题。要结合上下文在具体的语境中理解词义。文章提到,此外,处置煤烟比减少二氧化碳排放成本更低,并且不需要全球协定。因为地方会从中最大受益,所以没有人可以搭乘别人减排努力的便车。可知这里free-ride的真正含义是“不劳而获”,故选B)。
转载请注明原文地址:https://kaotiyun.com/show/Ncl7777K
0
大学英语四级
相关试题推荐
Newevidenceofasick,deprivedpopulationworkingunderharshconditionscontradictsearlierimagesofwealthandabundancefr
IntheAmericanfamily,thehusbandandwifeusuallyshareimportantdecision-making.Whenthechildrenareoldenough,theytak
Marriageemergedasthemostpopularinstitutionthroughouthistoryprimarilybecauseitwasaneffectivearrangementtoimprove
ResearchersattheLondonSchoolofHygieneandTropicalMedicinepublishedastudyshowingthat,becauseoffoodproductionand
WaystoLiveLongerA)WehavetheNHS(theNationalHealthService)andmuchoftherestoftheworldenviesusforit,buthowlo
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagainstdangersandstress;its【C1】______forceis,inth
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagainstdangersandstress;its【C1】______forceis,inth
A、Hedoesn’talwayslisten.B、Hehasanearinfection.C、He’snevermissedameeting.D、Hehastoattendanothermeeting.A对话中男士
Boilerroomsareoftendirtyandsteamy,butthisoneispristine(干净的)andcool.FoxPointisaspankingnew47-unit【C1】______bui
随机试题
女性,45岁,颈部不适,左上肢放射痛伴感觉障碍,考虑为颈椎病,神经根型,以下治疗措施中哪一项不宜采用
关于无效施工合同工程款的结算,正确的是()。
南云公司为上市公司,属于增值税一般纳税人,存货适用的增值税税率为17%;主要从事机器设备的生产和销售,销售价格为公允价格(不含增值税额),销售成本逐笔结转。2017年度,南云公司有关业务资料如下:资料一:1月31日,向甲公司销售100台A机器设备,单位销
社会主义精神文明在社会主义现代化建设中的重要战略地位和作用表现在()。
2006年7月1日,青藏铁路开始客车试运营。火车在其发明了近200年之际终于开到了世界屋脊之上。最早的火车机车的发明者是()。
在生物群落的地带性分布中,起支配作用的是______。
2019年是中俄建交70周年,应俄罗斯总统普京邀请,6月5日至7日,习近平主席对俄罗斯进行军事访问并出席第二十三届圣彼得堡国际经济论坛,在中俄建交70周年纪念大会讲话中,习近平对“新时代的中俄关系”提出的主张是()。
计算机指令一般包括操作码和地址码两部分,为分析执行一条指令,其(5)。
南京是中国东部重要的政治、文化和金融中心。自三国时期(theThreeKingdomsPeriod)开始,先后有六个朝代在此建都,因此南京有“六朝古都”(theAncientCapitalofSixDynasties)的美誉。南京城建于明朝
A、Powerplantsbumcoal.B、Factoriespoursewage.C、PeopleburytrashundergroundD、Citypopulationincreasesgreatly.A
最新回复
(
0
)