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1、Word格式Unit8FocusonGlobalWarmingTextcomprehensionI.AII.1.T; 2.T; 3.F; 4.F; 5.F.III.1.Paragraph2.Becauseglobalwarmingmaybethesinglelargestthreattoourplanet（theearth）.Low-lyingnationscouldbeawashinseawater,rainanddroughtpatternsacrosstheworldcouldchange,hurricanescouldbecomemor
2、efrequent,andElNinoscouldbecomemoreintense. 2.Paragraph3.Ourfactories,powerplants,andcarsburncoalandgasolineandspitoutcarbondioxide,producemethanebyallowingourtrashtodecomposeinlandfillsandbybreedinglargeherdsofmethane-belchingcattle,andreleasenitrogenoxidebyusingnitrogen-basedf
3、ertilizers. 3.Paragraph4.Theincreasedconcentrationsofgreenhousegases prevent additionalthermalradiation from leavingtheEarth,socausetheglobalwarming. 4.Paragraph7.Aslightincrease in heatandraininequatorialregionswouldincreasevector-borne带菌媒介引起的diseasessuchasmalaria;moreintensera
4、insandhurricanescouldcausemoreseverefloodingandmoredeathsincoastalregionsandalongriverbeds;evenamoderateriseinsealevelcouldthreatenthe low-lyingislands;hottersummerscouldleadto morecasesofheatstroke,hospitaladmissionsanddeathsamongvulnerablepeoplewithheartproblemsorrespiratorypr
5、oblems. 5.Paragraph8and10.Wecan curb ourconsumptionoffossilfuelsandusetechnologiestoreducetheemissionofheat-trappinggaseslike carbon二氧化碳 dioxide,methane,and nitrousoxides,andprotecttheforestsintheworld,andwecanalsoadvocatepoliciesthatwillcombatglobalwarmingoverthelongterm,things
6、likecleancars, environmentallyresponsible renewableenergytechnologies,andstoppingthe clear-cutting ofvaluableforests. IV.1.GlobalwarmingwillprobablybethemostseriousthreattoourEarth,ifwedonottakeintoaccountofsomeotherpossibledisasters,suchasanotherworldwar,collisionofourEarthwith
7、somesmallorbitingplanet,orspreadofincurablediseases. 2.Intermsofhumanhealth,thepeopleofthepoorercountrieswillsuffer完美整理Word格式most,becausetheircountriesdonothavemoneytoprotectthemwhenclimatechanges. StructuralanalysisSub-ideasinthesecondpart.1)the causes oftherisingconcentrationo
8、fgreenhousegasesintheatmosphere(Paragraphs3and4
