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
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and
admin
2018-10-19
47
问题
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and store it as carbon while releasing oxygen, a process for which forests have been called "the lungs of the planet". The roots of trees have been thought to trap sediments and nutrients in the soil. Trees have also been credited with steadying the flow of these rivers, keeping it relatively constant through wet and dry seasons, thus preventing both drought and flooding. It is all nonsense, concludes a research published this week. A four-year international study led by researchers at the University of Newcastle, in Britain, and the Free University of Amsterdam, identifies several myths about the link between forests and water. For example, in arid and semiarid areas, trees consume far more water than they trap. And it is not the trees that catch sediments and nutrients, and steady the flow of the rivers, but the fact that the soil has not been compressed.
The World Commission on Water estimates that the demand for water will increase by around 50% in the next 30 years. Moreover, around 4 billion people—one half of the world’s population— will live in conditions of severe water stress, meaning they will not have enough water for drinking and washing to stay healthy, by 2025.
The government of South Africa has been taking a tough approach to trees since it became the first to treat water as a basic human right in 1998. Trees lose water through evaporation(the technical term is transpiration)at twice the rate of grassland or South Africa’s unique fynbos scrubland. In a scheme praised by the hydrologists, the state penalizes forestry companies for preventing this water from reaching rivers and underground aquifers.
In India, large tree-planting schemes not only lose valuable water but complicate the true problem identified by the hydrologists: the unregulated removal of water from aquifers to irrigate crops. Farmers need no permit to drill a borehole and, as most farmers receive free electricity, there is little economic control on the volume of water pumped. In the Kolar district in Karnataka, wells have dried up as the water table has plummeted from six metres to 150 metres below ground.
Questions 71—75
Complete the summary with a maximum of two words from the passage, changing the form where necessary.
It is commonly believed that trees are good for the environment, as they absorb carbon dioxide and release oxygen: the roots of trees can trap water and【R1】______ the flow of rivers. However, a recent study has found that this belief is【R2】______.
According to the research, trees lose【R3】______ water through evaporation than they trap. In South Africa, forestry companies are punished as the trees they planted prevented water from【R4】______ rivers and underground aquifers. In India, farmers drilled many wells and used the underground water to【R5】______their farmland. This has lowered water table to 150 metres below ground. Many trees have been planted and in fact these trees complicate the existing problem.
【R4】
选项
答案
reaching
解析
文章倒数第二段提到the state penalizes forestry…from reaching rivers and underground aquifers.
转载请注明原文地址:https://kaotiyun.com/show/OFjK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
______thedangerfromenemyaction,peoplehadtocopewithasevereshortageoffood,clothing,fuelandalmosteverything.
On-campusHousingHousingpoliciesdifferfromschooltoschoolinAmericanuniversities./Someschoolshavelimitedhou
WorkingWhileStudyingintheUSInternationalstudentsarepermittedtoworkforthecollegeoruniversitytheyattend/
CreatingaLow-carbonSocietyInrecentyears,low-carbonlifestyleisvigorouslyadvocatedaroundtheworld.Eachandevery
A、It’saflextimecourse.B、Itrunsfor60hoursinall.C、It’snotadvancedlevel.D、Itincludesafieldtrip.D本题询问风景摄影的相关内容。录
Thevisitorsdecidedtostayinourcityfor________twodaysastheywantedtohavealookaround.
(1)JustwhenTransportforLondon(TfL)thoughtthebikehireschemeprovidedananswertoLondon’scarbonemissionsproblem,th
(1)JustwhenTransportforLondon(TfL)thoughtthebikehireschemeprovidedananswertoLondon’scarbonemissionsproblem,th
A.incidentB.whenC.includeD.flightsE.informedF.carriagesG.calledH.s
Turninyourcollectionofindustry-suppliedfreebiesandGoodmanwillsendbackafewreplacementpensbearingtheNoFreeLunc
随机试题
头罩式给氧法适用于
账务处理系统中系统初始化的主要内容包括()。
奖惩机制把会计职业道德要求与个人利益结合起来,体现了权利与义务统一的原则。()
2005年6月,上海某企业出口一批货物,成交条件为CFR,总价为1000美元,其中含运费5%,销售佣金300美元,则该批货物的FOB总价为()。
劳动力市场均衡是一种理想状态,但在现实中,经常会存在劳动力市场非均衡的状态,这与劳动力供求双方在劳动力市场上遭遇的摩擦力有关,例如企业并不都是按照所谓的通行市场工资率来支付工资,也不总是根据需要任意调整雇用的劳动力数量。而对于劳动者来说,他们也并非为获得更
优秀运动员为了突破长期固定模式下的运动障碍,可以采取突然增加负荷的方法对机体施加刺激。( )
下列哪些选项符合我国法律规定的“司法机关依法独立行使职权”原则的含义?()
由关系R1和R2得到关系R3的操作是()。
()消费()贸易壁垒()进货()出口
Childhoodisthetimewhentherearefewresponsibilitiestomakelife【11】.ifachildhasgood【12】,heisfed,lookedafterand
最新回复
(
0
)