高中英语global-warming-课件

Unit4GlobalWarminggreenhouse①whydopeoplepreferbuildinggreehousestogrowvegetablesandfruits?②Howdoesagreenhousework?Discuss:Thehighertemperatureincoldperiodcanhelpplantsgrow,soglobalwarmingdoesgoodtohumanbeings.Doyouagree?南极冰川融化速度加快全球变暖的可怕后果全球变暖导致冰雪融化全球气候变暖旱情严重Discuss:Whatcausesglobalwarming?Whatdoyouthinkweshoulddotodealwithglobalwarming?1.ArisingpopulationisoneofthemainreasonsthatcauseglobalwarmingThemorethepopulationincreases,themoregreenhousegasesthatareproducedandthegreatertheincreaseintemperature.2.TheburningoffossilfuelisoneofthemostfamouscausesforglobalwarmingWhenfossilfuelsburn,theyreleaselargeamountsofgreenhousegases,themostimportantoneiscarbondioxidewhichleadstoglobalwarming.温室效应(英文：Greenhouseeffect)，又称“花房效应”，是大气保温效应的俗称。大气能使太阳短波辐射到达地面，但地表向外放出的长波热辐射线却被大气吸收，这样就使地表与低层大气温度增高，因其作用类似于栽培农作物的温室，故名温室效应。自工业革命以来，人类向大气中排入的二氧化碳等吸热性强的温室气体逐年增加，大气的温室效应也随之增强，已引起全球气候变暖等一系列严重问题，引起了全世界各国的关注。Whatdoyouthinkweshoulddotodealwithglobalwarming?LivealowcarbonlifeUsecleanenergyTurnofftheelectricequipment,whenyoudon’tuseit.PlantmoretreesClosethehigh-pollutingfactoriesUsebusesorbikestogotoworkinsteadofcarsNowadays,peopledependonenergymoreandmore.1.Whichonescanbringgreenhousegasesintoatmosphere?2.Whichonesarerenewableandwhichonesarenon-renewable?energynaturegasessolarenergycoalnuclearenergyhydro-electricpowertidalenergybiomassenergyoilwindpowerEnergyrenewablenon-renewablesolarenergynaturegaseswindpowercoalhydro-electricpowernuclearenergybiomassenergyoiltidalenergy1.Firstreading(skimming)Tips(howtoskim):1.Readthearticlethroughinalimitedtime.2.Don’tstopatwordsorsentencestheydon’tunderstand.Tointroducethetopic.Toillustratepointsbyprovidingevidence.Toaskthereadertoreflectthethemeandpredictwhatwillhappeninthefuture.Secondreading(scanning)Tips(howtoscan):1.Donotneedtounderstandeverything.2.Runyoureyesalongthelinesofthearticletofindthespecialinformation.Arethesestatementstrueorfalse?Andthencorrectthefalseones.FalseTrueTrueFalseFalse1.Thetemperatureinthelastcencurydidn’tseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.Georgehambleybelievesthatglobalwarmingwilldogoodthanharmtotheearth.4.Whenwereducetheamountofgreenhouses,thetemperatureoftheearthwillnotgoup.5.Itisclearwhattheeffectsofglobalwarmingwillbe.ThirdreadingReadthearticlecarefully,thencompletethepassage.Everyonebelievesthatitisthathascausedthisglobalwarming.Theincreaseintheearth’stemperatureistheburningoffossilfuelslikecoal,naturalgasandoil.Somebyproductsofthisprocessarecalled.Suchgasescantrapheatfromthesunandthereforewarmtheearth,whichiscalledthe.Butweaddhugeextragreenhousegasesintotheatmosphere,causingtheglobaltemperatureto.However,theattitudesofscientiststowardsthisrisearecompletely.Drforsterthinksthatthewhichincreasesthetemperatureby5degreeswouldbea.But,GeorgeHambleyholdsthewiewthatanywarmingwillbewithfewbadenvironmental.Moregreenhousegaseswillmakeplantsgrow;cropswillproducemore;itwillencourageagreaterofanimals.Whatisyourtowardsglobalwarming?Everyonebelievesthatitishumanactivitythathascausedthisglobalwarming.Theincreaseintheearth’stemperatureisduetotheburningoffossilfuelslikecoal,naturalgasandoil.Somebyproductsofthisprocessarecalledgreenhousegases.Suchgasescantrapheatfromthesunandthereforewarmtheearth,whichiscalledthegreenhouseeffect.Butweaddhugequantitiesofextragreenhousegasesintotheatmosphere,causingtheglobaltemperaturetogoup.However,theattitudesofscientiststowardsthisrisearecompletelydifferent.Drforsterthinksthatthetrendwhichincreasesthetemperatureby5degreeswouldbeacatastrophe.But,GeorgeHambleyholdsthewiewthatanywarmingwillbemildwithfewbadenvironmentalconsequences.Moregreenhousegaseswillmakeplantsgrowquicker;cropswillproducemore;itwillencourageagreaterrangeofanimals.Whatisyourattitudetowardsglobalwarming?HomeworkLookformoreinformationaboutenvironmentalproblemsonInternet.Suggestedwebsites:://Wtiteapassageabout:What’syouropionaboutglobalwarming?Andwhatdoyouthinkweshoulddotoprotectourenrionment?Doyoubelieveit?Thankyou!