首页
登录
职称英语
Acid rain, which is a form of air pollution, currently becomes a subject of
Acid rain, which is a form of air pollution, currently becomes a subject of
游客
2024-01-31
17
管理
问题
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental damage for which it has been blamed. It forms when oxides of sulfur (硫) and nitrogen (氮) combine with atmospheric moisture to yield sulfuric and nitric acids, which may then be carried long distances from their source before they drop in the form of rain. The pollution may also take the form of snow or fog or fall down in dry forms. In fact, although the term "acid rain" has been in use for more than a century—it is derived from atmospheric studies that were made in the region of Manchester, England—the more accurate scientific term would be "acid deposition". The dry form of such deposition is just as damaging to the environment as the liquid form.
The problem of acid rain originated with the Industrial Revolution, and it has been growing ever since. The severity of its effects has long been recognized in local settings, as exemplified by the spells of acid smog in heavily industrialized areas. The widespread destructiveness of acid rain, however, has become evident only in recent decades. One large area that has been studied extensively is northern Europe, where acid rain has eroded structures, injured crops and forests, and threatened life in freshwater lakes. In 1984, for example, environmental reports indicated that almost half of the trees in Germany’s Black Forest had been damaged by acid rain. The northeastern United States and eastern Canada have also been particularly affected by this form of pollution. Damage has also been detected in other areas of these countries and other regions of the world.
Industrial emissions have been blamed as the major cause of acid rain. Because the chemical reactions involved in the production of acid rain in the atmosphere are complex and as yet little understood, industries have tended to challenge such assessments and to stress the need for further studies and because of the cost of pollution reduction, governments have tended to support this attitude.
Studies released by the USA government in the early 1980s, however, strongly indicated industries as the main source of acid rain, in the eastern USA and Canada. [br] Why is acid rain little understood?
选项
A、Because it is a new phenomenon.
B、Because it is not frequent enough.
C、Because its formation is complex.
D、Because it is difficult to study it.
答案
C
解析
由题干中“acid rain little understood”可以定位到文中第三段第二句话。该句提到酸雨在大气中的形成过程涉及复杂的化学反应,而且人们对其了解甚少。
转载请注明原文地址:https://tihaiku.com/zcyy/3409678.html
相关试题推荐
Acidrain,whichisaformofairpollution,currentlybecomesasubjectof
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
Searchingforloveisnolongerjustafavoritesubjectforsongs.Ithasal
随机试题
Thestewardessaskedallthepassengersonboardtoremain______astheplanewa
Canada’sCompetitionBureauhassomenewguidelinesgoverningon-lineadvert
Wheredotigerslive?North-easternChina,theIndiansubcontinent,and
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,
PreparingforComputerDisastersSummaryA)Whenhomeoffice
设A为2阶矩阵,P=(a,Aa),其中a是非零向量,且不是A的特征向量。 (Ⅰ
对放疗高度敏感的肿瘤是A.造血系统肿瘤 B.消化道腺瘤 C.食管癌 D.黑
城市中市级或区级商业设施比较集中的地区是指()。A.居住区 B.开发区
中国期货保证金监控中心有限责任公司应当将次日通过复核的客户交易编码申请资料转发给
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)