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1、AnOverviewofGlobal WarmingAnOverviewandtheCausesofGlobalWarmingJun142010GlobalWarming,thegeneralincreaseintheearth'snear-surfaceairandoceantemperatures,remainsapressingissueinasocietythathasexpandeditsindustrialusesincethemid-twentiethcentury.Greenhousegases,atmosp
2、hericgasesthatexisttokeepourplanetwarmandpreventwarmerairfromleavingourplanet,areenhancedbyindustrialprocesses.Ashumanactivitysuchastheburningoffossilfuelsanddeforestationincreases,greenhousegasessuchasCarbonDioxidearereleasedintotheair.Normally,whenheatenterstheat
3、mosphere,itisthroughshort-waveradiation;atypeofradiationthatpassessmoothlythroughouratmosphere.Asthisradiationheatstheearth'ssurface,itescapestheearthintheformoflong-waveradiation;atypeofradiationthatismuchmoredifficulttopassthroughtheatmosphere.Greenhousegasesrele
4、asedintotheatmospherecausethislong-waveradiationtoincrease.Thus,heatistrappedinsideofourplanetandcreatesageneralwarmingeffect.Scientificorganizationsaroundtheworld,includingTheIntergovernmentalPanelonClimateChange,theInterAcademyCouncil,andoverthirtyothers,haveproj
5、ectedasignificantchangeandfutureincreaseintheseatmospherictemperatures.Butwhataretherealcausesandeffectsofglobalwarming?Whatdoesthisscientificevidenceconcludeinregardstoourfuture?CausesofGlobalWarmingThecrucialcomponentthatcausesgreenhousegasessuchasCO2,Methane,Chl
6、orofluorocarbons(CFC's),andNitrousOxidetobereleasedintotheatmosphereishumanactivity.Theburningoffossilfuels(i.e.,non-renewableresourcessuchasoil,coal,andnaturalgas)hasasignificanteffectonthewarmingoftheatmosphere.Theheavyuseofpowerplants,cars,airplanes,buildings,an
7、dotherman-madestructuresreleaseCO2intotheatmosphereandcontributetoglobalwarming.Nylonandnitricacidproduction,theuseoffertilizersinagriculture,andtheburningoforganicmatteralsoreleasethegreenhousegasNitrousOxide.Theseareprocessesthathavebeenexpandedsincethemid-twenti
8、ethcentury.DeforestationAnothercauseofglobalwarmingisland-usechangessuchasdeforestation.Whenforestlandisdestroyed,carbondioxideisreleasedintothea