首页
登录
职称英语
Desertification(沙漠化)in the dry United States is very serious. Groundwater su
Desertification(沙漠化)in the dry United States is very serious. Groundwater su
游客
2023-07-06
26
管理
问题
Desertification(沙漠化)in the dry United States is very serious. Groundwater supplies beneath vast stretches of land are dropping rapidly. Many river systems have dried up. Hundreds of thousands of acres of previously irrigated cropland have been abandoned to wind or weeds. Several million acres of natural grassland are eroded at unnaturally high rates as a result of cultivation or overgrazing(过度放牧). All told, about 225 million acres of land are under severe desertification.
Federal subsidies(补贴)encourage the exploitation of dry land resources. Low-interest loans for irrigation and other water delivery systems encourage farmers and industry to mine groundwater. Federal disaster relief and commodity program encourage dry-land farmers to plow up natural grassland to plant crops such as wheat, especially, cotton. Federal grazing fees that are well below the free market price encourage over-grazing of the commons. The market, too, provides powerful incentives(激励)to exploit dry land resources beyond their carrying capacity.
The incentives to exploit dry land resources are greater than ever. The government is now offering huge new subsidies to produce synthetic fuel from coal oil as well as alcohol fuel from crops. Moreover, commodity prices are on the rise; and they will provide farmers and agricultural businesses with powerful incentives to overexploit arid land resources. The existing federal government cost-share programs designed to help finance the conservation as soil, water, and vegetation are pale in comparison to such incentives.
In the final analysis, when viewed in the national perspective, the effects on agriculture are the most troublesome aspect of desertification in the US. For it comes at a time when we are losing over a million acres of rain-watered crop and grass land per year to higher uses—shopping centers, industrial parks, housing development, and waste dump—regardless of the economic need of the US to export agricultural products or of the world’s need for US food and fiber. Today the dry West accounts for 20 percent of the nation’s total agricultural output. If the US is, as it appears, well in its way toward overdrawing the dry land resources, then the policy choice is simply to pay now for the appropriate remedies or pay for later when productive benefits from arid land resources have been both realized and largely terminated. [br] Which of the following is mentioned as a result of severe desertification?
选项
A、The decline of forest coverage.
B、The lack of water supplies.
C、A decrease of crop production.
D、A sharp increase of farmland.
答案
B
解析
事实细节题。在干旱的美国,沙漠化现象非常严重。大片土地下的地下水供应量正在迅速下降,很多水系已经干涸,粮田荒芜,草原流失。由选项来看,B)“供水的短缺”为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2814213.html
相关试题推荐
IntheUnitedStates,acountryofimmigrants,prejudiceanddiscrimination
IntheUnitedStates,acountryofimmigrants,prejudiceanddiscrimination
IntheUnitedStates,acountryofimmigrants,prejudiceanddiscrimination
IntheUnitedStates,acountryofimmigrants,prejudiceanddiscrimination
IntheUnitedStates,acountryofimmigrants,prejudiceanddiscrimination
[originaltext](16)IntheUnitedStates,thesocialproblempresentedbyhea
[originaltext](16)IntheUnitedStates,thesocialproblempresentedbyhea
[originaltext]TheUnitedStatesoperatesunderafederalsystemofgovernme
[originaltext]TheUnitedStatesoperatesunderafederalsystemofgovernme
[originaltext]IntheUnitedStates,manypeopleoncelivedinlarge,twoan
随机试题
Historiansandphilosophersagreethateversincethedevelopmentofagricult
Ifyouwipeafingeracrossahouseholdsurfacethathasn’tbeencleanedin
ThehotelTerrystayedatcanbedescribedas______.[originaltext]Presenter:To
NewRulesforLandingaJobWhenNickA.Corcodilos
()本人自愿应征并且符合征兵条件的,优先批准服现役。A.烈士子女 B.因公牺
根据FIDIC合同价款结算的规定,业主所扣留承包商保留金的第二次返还时间是( )
180、电容器绝缘介质的平均电场强度不宜高于()kV/mm。 A、52
在二手房贷款中,一般由()承担阶段性保证责任。A.借款人所在单位
我国现行的IPO监管制度是()。A、审批制 B、注册制 C、通道制
按照我国现行中央政府与地方政府事权的划分,地方政府所承担的支出范围主要是本地区
最新回复
(
0
)