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
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental dam
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental dam
admin
2015-02-09
51
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(梳)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.
The second paragraph is mainly about______.
选项
A、the origin of acid rain
B、the cause of acid rain
C、the formation of acid rain
D、the widespread damage of acid rain
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/a7q7777K
0
大学英语四级
相关试题推荐
Thetwoeconomistscalltheirpaper"MentalRetirement,"andtheirargumenthasarousedtheinterestofbehavioralresearchers.
SchoolLunchA)Ryanmovedsilentlythroughthelunchline.Thecookputacheeseburger(奶酪汉堡)andanapplesaucecuponhistray.H
A、Becauseshecanpaythehigherfuelcosts.B、Becauserisingfuelcostscanbenefittheenvironment.C、Becauseshecansavemor
AuniquelaboratoryattheUniversityofChicagoisbusyonlyatnight.Itisadreamlaboratorywhereresearchersareatworks
A、BecauseLondontaxidriversallhavegonethroughaverytoughtrainingperiodtogetspecialtaxidrivinglicense.B、Because
A、Theyinvadethecomputerandmakeitaplaceformanufacturing.B、Theyspreadthroughoutthewholesystembyquicklycopyingt
TVLinkedtoLowerMarksA)Theeffectoftelevisiononchildrenhasbeendebatedeversincethefirstsetswereturnedon.Nowt
Whydoescreamgobadfasterthanbutter?Someresearchersthinkthatitcomesdowntothestructureofthefood,notitschemic
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknowwhoyouare.Youcouldn’tthinkaboutthepastorpla
随机试题
胆胃不和,痰热内扰,症见虚烦不眠,惊悸不宁者,治宜选用()(1995年第52题)
MsgBox函数使用的正确语法是()。
A、HCO3-↓,pH↑,PaCO2↓B、HCO3-正常,pH↓,PaCO2↓C、HCO3-正常或↑,pH↓,PaCO2↓D、HC3-↑,pH↑,PaCO2正常或↑E、HCO3-↓,pH↓,PaCO2正常或↓代谢性碱中毒
在法人治理结构中,()是监督机构,向股东会负责,对董事会和经营管理层的决策和经营管理活动进行监督。
甲公司系增值税一般纳税人,销售商品适用增值税税率为17%,发生的有关债务重组经济业务如下:(1)2×17年1月1日与丙银行协商并达成协议,将丙银行于2×16年1月1日贷给甲公司的3年期,年利率为9%,本金为500万元的贷款进行债务重组,丙银行未对该项贷款
皮亚杰认为,儿童在判断行为对错时,是()。
Whichflightwillthemantake?
WhydoesMrs.Smithfeelsad?
HowtoReducePresentationStress1.Causesofpresentationstress■Fearofbeing【T1】______【T1】______■D
【R1】______Ifthesettingisscenic,itsclaimstofameareslender:athrivingumbrellaindustryandareputationasthecoldest
最新回复
(
0
)