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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionC教学资源共享Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?cities,pollute,healthproblemsInourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomething
2、aboutthem?factories,thelandandtheair,deadInourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?cutdown,millionsof,takeawaytheearth,becomedesertInourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?
3、oxygenaspecialkindofoxygencalled“ozone”(O3)averybigholeintheozonelayer,toomuchharmfulradiationfromthesun臭氧层视频Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?CO2carbondioxideincreasealot,forma“blanket”,theheatfromthesun
4、can’tescapecausetheleveloftheseatorisecalled“thegreenhouseeffect”or“globewarming”温室效应：视频1,视频2Whatotherkindsofenvironmentalproblemscanyouthinkof?Talkaboutthemwithyourclassmates.fewertreesfactorypollutiontrafficpollutiontheozonelayermorecarbondioxideCan
5、youmatchthem?FewertreesFactorypollutionTrafficpollutionTheozonelayerMorecarbondioxideAlltheseproblemsareveryserious.Whatcanwedotosolvethem?Readandunderstand（影片）Canyouchooseasuitabletitleforeachparagraphfromthephrasesbelow?Theearthis4600millionyearsold
6、.Wehumanshavelivedonearthforonly35000years,butduringthisperiodwehavechangedourplanetalotinmanyways.Somethingswe’vedoneareverygoodfortheearthwhilesomearebad._________Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theeart
7、histakenaway.Forestshavebecomedeserts,somoreandmoresortsofanimalsandplantsaredisappearing.FewerTrees____________Inbigcities,carsandbuseshavepollutedtheair.Manypeopleincitiesnowhavehealthproblems._____________Factorieshavealsopollutedthelandandthewater
8、.Asaresult,manyriversandlakesarenowdead._____________Aroundtheearth,there’saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingitandthathasmadeaverybigholeintheozonelayer.Toomuchharmfulradiationfromthesu
