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
2016-12-08
18
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.
【R1】
选项
答案
stabilize
解析
stablize“使稳定”,即文中的“steady”。
转载请注明原文地址:https://kaotiyun.com/show/pBjK777K
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
PreparingFishforDryingandSmoking1.Driedfish■cutofftheheadifthefishislong■【T1】_______inside,rubsal
StopBeingaPeoplePleaser1.Say"no"■Givereasonsinsteadof【T1】______excuses【T1】______■Examples■It’ss
StopBeingaPeoplePleaser1.Say"no"■Givereasonsinsteadof【T1】______excuses【T1】______■Examples■It’ss
TheLinguisticGiftofBabiesCriticalageDeclineofbabies’languagelearningabilityoccursattheageof【T1】_____.
InternationalDiningEtiquette1.Asia■Rulesofusingchopsticks■Restthemonaplateora【T1】______【T1】____
InternationalDiningEtiquette1.Asia■Rulesofusingchopsticks■Restthemonaplateora【T1】______【T1】____
InternationalDiningEtiquette1.Asia■Rulesofusingchopsticks■Restthemonaplateora【T1】______【T1】____
AllthefollowingsentencesindicateapassivemeaningEXCEPT
随机试题
某市环保局应当地居民的举报对排放烟尘超过国家规定指标的某化工厂作出了罚款4万元的行政处罚,并责令其限期改正。化工厂对环保局的行政处罚决定不服,于2008年3月向法院提起行政诉讼。诉讼期间,原告找到被告要求协商解决,被告同意,遂变更了原行政处罚决定,对原告只
证明ax=1(a>0,a≠1).
手工钨极氩弧焊电弧电压的大小,主要是由弧长决定的。
Haveyoueverheardofonlinelearning?Ifyouareunfamiliarwithit,pleasereadthefollowing【B1】______introduction.Onlinec
一头成年奶牛,乏情,直肠检查子宫大小与妊娠2个月相似,子宫壁薄,波动极其明显,两侧子宫角容积大小可变动。与本病无关的是()
临床中可将缺氧分为5种类型,下列哪项不正确()
将现金送存银行,会计人员应填制的记账凭证是()。
在中国传统观念中,雕塑一直未被看作是与绘画同等的艺术形式;在中国传统学术中,也只有“画学”而没有“雕塑学”。历史上的这种不重视,造成19世纪末20世纪初,大量具有极高史料研究价值的石雕作品流失海外。而今天,新兴收藏家们的目光也只停留在艺术品的财富表象上,因
商业广告是指商品经营者或者服务提供者承担费用,通过一定的媒介和形式直接或间接地介绍自己所推销的商品或者所提供的服务。下列属于商业广告的是()。
关于B-ISDN说法中不正确的是______。
最新回复
(
0
)