全球变暖英语演讲.ppt

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1、CONTENTwhatisglobalwarming?WhatCausesGlobalWarming?humanactivitiesNaturephenomenonWhatareTheEffectsofGlobalWarmingSeaLevelRisethedestructionofmanyimportantecosystemsSolutionstoGlobalWarmingwhatisglobalwarming?GlobalWarmingistheincreaseofEarth'saveragesurfacetemperature

2、duetoeffectofgreenhousegases.suchascarbondioxideemissionsfromburningfossilfuelsorfromdeforestation,whichtrapheatthatwouldotherwiseescapefromEarth.Thisisatypeofgreenhouseeffect.ThecauseshumanactivitiesNaturephenomenonThecausesTheEffectsshrinkingofglacierscausesealevelri

3、se.thedestructionofmanyimportantecosystemsTheEffectsSolutionsRefuseuseone-offchopsticsRecycleasmuchasyoucanreducevehicleemissionsplantingmoretreesandstopfactoriesfromsendingoutwasteair演讲稿。下载可放大。whatisglobalwarming?Globalwarmingisanincreaseintheaveragetemperatureoftheea

4、rth'ssurfaceovertime.Thisriseresultsfromthe"greenhouseeffect,"inwhichgasessuchascarbondioxidetrapheatwithintheearth'satmosphere.Theclimbingtemperaturescouldcausecatastrophicclimatechange.globalwarming,inbrief,globlawarmingisearth'stemperaturegettinghotter.WhatCausesGlo

5、balWarming?hereigivetwotipsforallofyouone,nowadayspeoplebuildallkindsoffactorytomanufatureSincetheindustrialrevolution,humanbeingstoeconomicdevelopmentofburningfossilenergy,totheatmospheretoomuchcarbondioxideemissions,whilepeoplecutalargeforesttomakesomthing,whichledto

6、thegreenhouseeffect,theenvironmentalpollutionandsoonScientistsbelievethatweareinthebeginningofanewwarmperiod,evenwithouttheincreaseofcarbondioxide,thetemperaturewillrise.WhatareTheEffectsofGlobalWarmingshrinkingofglacierscausesealevelrise,anditwillcauselowsealevelcount

7、riesdisapperso,howtosolvetheseproblem.