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
50
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
(all)nonsense
解析
胡说,谬论。
转载请注明原文地址:https://kaotiyun.com/show/ZckK777K
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
Heisquitesurethatit’s_______impossibleforhimtofulfillthetaskwithintwodays.
A.incomeB.polarizationC.transformationsD.oldE.changesF.worseG.relaxedH.therebyI.divisionJ.accompanying
Sleep1.Howmuchsleepdoweneed■Recommendedamountforadults:【T1】______hours【T1】______2.Waysforabetterni
Afteralongstruggle,Samfinallygotthebetterofhimself.Theunderlinedpartmeans______.
A.roleB.enormousC.InsteadofD.mutteringE.strikingF.mediatedG.originallyH.
A.roleB.enormousC.InsteadofD.mutteringE.strikingF.mediatedG.originallyH.
A、Becauseshewasnotaconventionalwoman.B、Becauseshewantedtohelppeople.C、Becauseshewantedpeaceintheworld.D、Beca
A.fightingB.subjectsC.certainlyD.questionE.resultinF.furtherG.appearance
A、Supportive.B、Neutral.C、Doubtful.D、Negative.D由原文可知,当男士听到几个主要的航空公司在考虑允许乘客在飞机上使用手机的消息后,表示难以置信,并说这是他听过的最坏的消息之一。由此可见,他的态度是反对的。因
Unfortunately,itwasaftertwoo’clockinthemorning________hearrivedatasolution.
随机试题
下列哪一行为不成立使用假币罪(不考虑数额)?()(2015/2/15)
运动员禁用的药品是驾驶员驾车时,慎用的药品是
某病人以慢性肾炎住院。医生要知道这个病人的肾小球滤过功能,最早反映其损害的结果是
以下做法符合法律规定的是()
某工程由六个分部工程组成,采用价值工程分析得到各分部工程功能指数和成本指数如下表所示:价值工程活动的核心工作是对产品进行()。
商用房贷款的贷后管理包括()。
对于下列经济业务活动,依照《中华人民共和国会计法》的规定,应当办理会计核算的有()。
认真阅读下文,并按要求作答。火烧云晚饭过后,火烧云上来了。霞光照得小孩子的脸红红的。大白狗变成红的了。红公鸡变成金的了。黑母鸡变成紫檀(tán)色的了。喂猪的老爷爷在墙根靠着,笑盈(yíng)盈地看着他的两头小白猪变成小金猪了。他刚想说
根据尼奎斯特定理,若信道带宽为6KHz,那么,理想信道的波特率为(193);若采用QPSK调制,其数据速率应为(194);如果该信道信噪比为30dB,则该信道的带宽约为(195)。设信道误码率为10-5,帧长为10K比特,差错为单个错,则帧出错的概率为(1
以下是正确C语言标识符的是()。
最新回复
(
0
)