九年级英语上册-Unit-2-Saving-the-earth-Topic-2-All-these-

Unit2SavingtheEarth

1/28Topic2

Alltheseproblemsareveryserious.

SectionC课件1

2/28Review3/28(1)________ofusknowshowtostopthebadbehaviour.(2)Iknockedonthedoorbut___________answered.(3)Someofthesebooksarebetterthan__________.Fillintheblanksusing

something,anything,others,nobody,everyone,anybody,everywhere,none,other.Nonenobodyothers4/28(4)Shewasdrivingthecarwithonehandandwipingthewindowwiththe_______.(5)TheyarebeautifulbutIamlookingfor___________useful.(6)Isthere___________youcandotohelpher?othersomethinganything5/28(7)There’re5000peoplelivinghereandalmost_________hashis/herowncar.(8)He’sclevererthan____________Iknow.(9)I’velooked__________butIcan’tfindit.everyoneanybodyeverywhere6/28Whatcanwedotoprotectourenvironment?

7/28Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

cities,pollute,healthproblems

factories,thelandandtheair,dead8/28Inourdailylife,weshouldfacemoreenvironmentalproblems.

Canyousaysomethingaboutthem?

cutdown,millionsof,

takeawaytheearth,becomedesert拿走9/28Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

oxygen

aspecialkindofoxygencalled“ozone”(O3)氧气10/28

averybigholeintheozonelayer,toomuchharmfulradiationfromthesun臭氧层放射，放射物n.洞，坑11/28v.出现，形成n.种类，形式Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?CO2

carbondioxideincreasealot,forma“blanket”,theheatfromthesuncan’tescape二氧化碳毛毯，毯子渗出；逃跑；逃脱12/28

causetheleveloftheseatorisecalled“thegreenhouseeffect”or“globalwarming”v.上升；起床；升起温室效应13/28Exercises14/28fewertreesfactorypollutiontrafficpollutiontheozonelayermorecarbondioxideCanyoumatchthem?15/28ChoosesuitabletitlesforParagraphs2-6.Thenwriteitdowninfrontofeachparagraph.A.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.MorecarbondioxideTheearthis4.6billionyearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,wehavechangedourplanetalotinmanyways.Somethingswe'vedoneareverygoodfortheearthwhilesomearebad.____________Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshavebecomedeserts,somanykindsofanimalsandplantsaredisappearing.FewerTrees16/28______________Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems._______________Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead._______________Aroundtheearth,there'saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingitandmakingaverybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.Thisisverydangerousbecausethiskindofradiationcancausecancer.

TrafficPollutionFactoryPollution

TheOzoneLayer17/28

_____________________Carbondioxide(CO2)intheairhasincreasedalot.Itmainlycomesfromburningoil,coalandwood.Thishasformedablanketaroundtheearth.Theheatfromthesuncan'tescapesothetemperatureisrising.Thisiscalled“thegreenhouseeffect”.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.Alltheseproblemsareveryserious,sowemustdosomethingnow.MoreCarbonDioxide18/28ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

greenhouseeffect,levelofoceansrising,climatechangeRetellitcarsandbusespolluteair,healthproblemspollutelandandwater,riversandlakesdeadharmfulradiationreachestheearth,causecancerfactorypollution

ozonehole

moreCO219/282SurftheInternettocollectmoreinformationaboutenvironmentalproblemsandeffects.Thendiscusstheinformationingroupsandtakenotes.

20/283.Combinethekeypointsin1cand2toformashortpassageandpayattentiontotheproperlinkingwords.21/28Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespourwastewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavediedandwecan’tswiminthewater.Waterisveryimportanttohumanbeings,soweshoulddoourbesttoprotectandsaveit.Luckily,ourgovernmentistakingmeasurestoprotectthewaterfrompollution.Youcanwriteitlikethis:22/28Summary23/281.Somewords:hole,form,rise

2.Somephrases:takeaway,referto

3.Somesentences:Alltheseproblemsareveryserious,sowemustdosomethingnow.

Welearn:24/281.Talkabouttheharmofpollution.