global-warming-.ppt

Prague’s（布拉格，TheCzechcapital）temperaturereachthepeakatthesametimefornearly60years！GlobalWarmingByXuhang8th,April,2011Content(4whats):1.Whatisglobalwarming?2.Whatcauseglobalwarming?3.Whatistheimpactofglobalwarming?4.Whatweshoulddotofaceglobalwarming?What’sglobalwarmingThechangeinthesurfaceairtemperature,referredtoastheglobaltemperature，broughtaboutbytheenhancedgreenhouseeffect(温室效应),whichisinducedbyemissionofgreenhousegasesintotheair.GlobaltemperaturechangeWhat’smore,scientistsexpectedthattheaverageglobalsurfacetemperaturecouldrise0.6-2.5℃inthenext90years,and1.4-5.8℃inthenextcentury!Whatcauseglobalwarming•Greenhouseeffect•Humanactivities-emissionGreenhouseeffectHumanactivities-emission1.Deforestation（森林砍伐）Desertification(沙漠化)2.IndustrialproductionWhat’stheimpactofglobalwarmingDroughtGuangxi,Chongqing,Sichuan,Guizhou,Yunnan,fiveprovinceshavebeencausedbyaseveredrought51.049millionpeoplewereaffected,tollsdirecteconomiclossesof19.02billionyuan.FloodMorethan3millionofthem-thatismorethan10percentofAustralia'spopulation!-havebeenaffectedbythis:massivefloodingineasternAustralia.AuthoritiescallingthisoneofthemostcostlydisastersinAustralia'shistory.Thefloodshavehadabigimpactoncrops,ontourism,retailandmanufacturing.Whatweshoulddo•Nationalefforts•IndividualeffortsNationalefforts•Trytoagreeonamajornewinternationaltreatytocurbthegasesthatpromoteglobalwarmingamongallnations.•Makelawstoprotectenvironmentineverynation.Individualefforts•Gotowokbybus,foot…•Usefewerelectronicproducts•SaynotoplasticbagsWhat’stheimpactsofglobalwarmingAlaskain2000Alaskain2008TheYellowRiverstartingpointin2002TheYellowRiverstartingpointin2007