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
35
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
Apersonneedstoknowwhoheorsheisbeforebeingabletoknowwhat______makeshimorherhappy.
Inthesentence"HetoldmethathisbrotherJohnisaworld-famousdoctor",theunderlinedpartisusedas
TheConsequencesofTeenageSmokingDespitethemountainsofinformationwarningusofthedangerofsmoking,teenagersmoki
TheLinguisticGiftofBabiesCriticalageDeclineofbabies’languagelearningabilityoccursattheageof【T1】_____.
Youbecomesodeeplyabsorbedinanactivitythatyoulose_____oftime.
Arecentsurveyshowsthatmostadolescentseat______astheyactuallyneedeveryday.
(1)Hippiesweremembersofayouthmovementofthe1960’sand1970’sthatstartedintheUnitedStatesandspreadtoCanada,Gre
(1)FindingNemomayhaveleftlocaltheatres,butinthesouthernsea,alegionofbrightly-colouredanemonefishonlyrecently
(1)Faster,cheaper,better—technologyisonefieldmanypeoplerelyupontoofferavisionofabrighterfuture.Butasthe202
Turninyourcollectionofindustry-suppliedfreebiesandGoodmanwillsendbackafewreplacementpensbearingtheNoFreeLunc
随机试题
退行性骨关节病的好发部位不包括
根据质量特性的分类,食品的味道属于()
A.戴清洁手套B.戴一次性手套C.戴医用口罩D.戴防护镜E.穿隔离衣进行手术等无菌操作时应
无吸收过程的给药途径
A.易寒B.易热C.易虚D.易实E.易愈小儿具有“稚阳未充”的特点,患病
宫颈活检的病理报告为“鳞状上皮化生”,临床上应认为是
2008年12月,某军队保卫部门对军队内的一起盗窃案件进行侦查,并对犯罪嫌疑人进行了拘留和逮捕。根据刑事诉讼的相关立法规定,军队保卫部门在对军队内部发生的刑事案件的处理过程中所享有的职权是哪些?
下列不属于纳税担保的是()。
(1990年)设函数则f[f(x)]=________________.
在数据链路层中,由于数据以帧为单位一帧一帧地传输,因此,当接收方识别出某一帧出现错误时,只需重发( )而不必将全部数据进行重发
最新回复
(
0
)