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
2012-02-12
34
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. Fanners 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. Summary:
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【41】______ the flow of rivers. However, a recent study has found that this belief is【42】______.
According to the research, trees lose【43】______ water through evaporation than they trap. In South Africa, forestry companies are punished as the trees they planted prevented water from【44】______rivers and underground aquifers. In India, farmers drilled many wells and used the underground water to【45】______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.
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/ackK777K
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
Thatourenvironmenthaslittletodowithourabilities,charactersandbehavior______centraltohistheory.
A.informedB.careerC.presentingD.relevantE.successfulF.effortG.remindedH.consideringI.deliberatelyJ.stress
A.informedB.careerC.presentingD.relevantE.successfulF.effortG.remindedH.consideringI.deliberatelyJ.stress
ShouldCollegeStudentsOpenE-shops?Moste-shopsarerunbyyoungpeople.Somecollegestudentsalsotrytoopene-shopsi
InternationalDiningEtiquette1.AsiaRulesofusingchopsticksRestthemonaplateora【T1】______Avoidtorestthem【T2】_____
InternationalSummerExchangeProgram1.Aimsoftheprogram■Tocreatearewardingexchangeexperience2.Components■【T1】___
Manypeople,especiallygirls,wouldliketoloseweightbyeatingless.Whatisyouropinionaboutit?WriteonANSWERSHEE
Itwasunfortunate,butshehadno______buttoactasshedid.
我更喜欢通过电子邮件而不是电话和顾客交流。(insteadof)
随机试题
列表说明公共关系在市场营销中的作用与传统的促销方式之间的不同之处。
伴随着市场化的整体经济体制改革进程,我国财政的发展方向是
肾小球滤过率是指
A.AML-M3B.慢性再障C.CMLD.淋巴瘤E.CLL首选雄性激素为主的综合治疗
MnO2+HCl=MnCl2+Cl2+H2O将反应配平后,MnCl2的系数为()。
《国务院关于加快培育和发展战略性新兴产业的决定》提出,到2015年,战略性新兴产业增加值占国内生产总值的比重力争达到()左右。
大型基坑初期排水,排水时间可采用()d。
图书出版合同的内容必须有()等。
小班赵老师发现,幼儿进餐时有各种问题:有的幼儿情绪不稳定,吃饭时哭着要妈妈;有的幼儿不会拿勺吃,一定要老师喂;有的幼儿挑食,不吃这个,不吃那个;还有的幼儿吃一会儿,玩一会儿,饭凉了都还没吃完……请设计一份解决上述问题的教育方案。要求:写
TomAlciereMr.Alcierehadnottriedtoconcealthis.HepostedvigorousnotesonInternetdiscussionboards;one,inOctob
最新回复
(
0
)