首页
登录
职称英语
Conventional wisdom says trees are good for the environment. They absorb car
Conventional wisdom says trees are good for the environment. They absorb car
游客
2023-10-20
13
管理
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. [br] 【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://tihaiku.com/zcyy/3115600.html
相关试题推荐
Iamgoingtoworkinatotallynewenvironment.【T1】________.Iamusedtow
Iamgoingtoworkinatotallynewenvironment.【T1】________.Iamusedtow
Iamgoingtoworkinatotallynewenvironment.【T1】________.Iamusedtow
Iamgoingtoworkinatotallynewenvironment.【T1】________.Iamusedtow
Iamgoingtoworkinatotallynewenvironment.【T1】________.Iamusedtow
AccordingtothepsychoanalystSigmundFreud,wisdomcomesfromthe________ofma
善良比智慧更重要,认识到这一点便是智慧的开始。——,andtherecognitionofthisisthebeginningofwisdom
Conventionalwisdomsaystreesaregoodfortheenvironment.Theyabsorbcar
Conventionalwisdomsaystreesaregoodfortheenvironment.Theyabsorbcar
Conventionalwisdomsaystreesaregoodfortheenvironment.Theyabsorbcar
随机试题
[originaltext]Atschoolandatwork,Ihavenoticedthatpeoplehavediffer
ThreecenturiesagotheFrenchmathematicianReneDescartespredictedthati
测得某地200名健康成年人的血红蛋白含量均数为125.4g/L,标准差为8.6g
高血压病人的术前准备,以下哪项正确:A.舒张压持续超过100mmHg,均给抗高血
统计用区划代码中,前6位数字可以表示( )行政区划。A.省级 B.地级 C
下列选项中,运算结果一定是无理数的是()。A.有理数与无理数的和 B.有理
代谢性酸中毒时过度通气可产生A.水肿 B.水中毒 C.低渗性脱水 D.呼吸
期货交易所以营造公开、公平、公正和诚信透明的市场环境与维护投资者合法权益为基本宗
“塞因塞用”适用于A.阳明腑实证 B.气郁腹胀 C.脾虚腹胀 D.血虚经闭
在商业银行的投资业务中,所持有证券的发行人破产可能蒙受损失的风险属于()。
最新回复
(
0
)