新视野英语教程 2 U7.ppt

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1、PollutionUnit7NEWHORIZONENGLISHCOURSESBookTwoUnit7Pollution1AroundtheTopic2SectionA3SectionB4SectionCLeadinginExploringtheTopicPlusActivitiesWarming-upTextAExercisesBackgroundInformationReadingThroughExercisesRelatedKnowledgeSampleReadingExercisesUsefulTermsPollutionisama

2、jorproblemintheworldtoday.Itdamagestheenvironmentandisharmfultohumans,animalsandplants.Althoughpollutioncanbearesultofnaturaldisasterssuchasearthquakesandforestfires,itismostlycausedbyhumanactivity.Withtheincreaseofpopulationandthedevelopmentoftechnology,pollutioninourmod

3、ern-dayworldhasreacheddangerouslevels.Cleanandfreshairisnowaluxuryinmanybigcitiesandthewaterinmanyofourriversandlakesaretoopollutedtodrinkandswimin.Theenvironmentisourlifesupportsystem—theonlyonethatwehave.Weshoulddoourbesttosaveitbeforeit’stoolate.Directions:Land,airandw

4、aterpollutionarethethreemaintypesofpollution.Lookatthepicturesbelowandwritedownwhatparticularformofpollutioneachpicturedescribes.Thenchoosefromtheanswers(A-H)providedintheboxesatthebottomofthepagetocompletetherestoftheinformationforeachpicture.Answersmaybeusedmorethanonce

5、.Formofpollution:_______Itssources:__________Itseffects:__________AirFADCADHWaystopreventorreduceit:___________Formofpollution:__________Itssources:__________Itseffects:__________Waystopreventorreduceit:___________Formofpollution:__________Itssources:__________Itseffects:

6、__________Waystopreventorreduceit:___________WaterLandHEICBIBCGCEGSourcesofPollutionA.WastegasesfromautomobilesB.LitteringC.UseofchemicalsinfarmingD.BurningcoaltoheathomesE.SewageandwastewaterfromhomesandfactoriesF.EmissionsofharmfulgasesfromfactoriesG.Wastematerialsfromh

7、omesandindustriesdumpedinlandfillsH.GarbagedumpedintotheseaEffectsofPollutionA.CausepeopletogetsickB.KillanimalsandplantsC.GiveoffbadsmellsD.ProduceacidrainE.PollutesoilandgroundwaterF.CauseanimalstolosetheirhomesG.ReducefarminglandH.Contributetothegreenhouseeffect/global

8、warmingWaystoPreventorReducePollutionA.InvestingreenenergysuchaswindorsolarenergyB.Reducetheamou