最新acid-rain酸雨英文版教学讲义PPT课件.ppt

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1、acid-rain酸雨英文版Chapter1Thedefinitionofacidrain“Acidrain”isabroadtermusedtodescribeseveralwaysthatacidsfalloutoftheatmosphere.Amoreprecisetermisaciddeposition（沉积物),whichhastwoparts:wetanddry.Itcandoharmtoplants,aquaticanimals,andinfrastructure（基础设施）.Chapter3ThecauseofacidrainScientistsdisco

2、vered,andhaveconfirmed,thatsulfurdioxide(SO2)andnitrogenoxides(NOx)aretheprimarycausesofacidrain.IntheUS,About2/3ofallSO2and1/4ofallNOxcomesfromelectricpowergenerationthatreliesonburningfossilfuelslikecoal.Acidrainoccurswhenthesegasesreactintheatmospherewithwater,oxygen,andotherchemicalst

3、oformvariousacidiccompounds.Sunlightincreasestherateofmostofthesereactions.Theresultisamildsolutionofsulfuricacidandnitricacid.CausesofAcidRainSulfurdioxideandnitrogenoxides(二氧化硫和氮氧化物）NaturalcauseFireVolcanoeruptionBacterialdecompositionLightningVolcanoeruptionlightningBacterialdecomposit

4、ionfireHumanactivitiesVehiclegasesFossilfuelsIndustrialProductioncivilianlifeVehiclegasesFossilfuelsIndustrialProductioncivilianlifeThemaincauseofacidrainChapter4TheinfluenceandsolutionsTheinfluence…?321Also,theinfluenceincludethat:SurfacewatersandaquaticanimalsForestsandsoilAutomotivecoa

5、tingsMaterials(metals,buildings,statues)VisibilityHumanhealthTheepiloguesolutionChina1.Improvetheenvironmentallawsandregulations,strengthensupervision(监督）andmanagement2.Adjusttheenergystructure,improvingcombustiontechnology（燃煤技术）3.Improvethetrafficenvironment,controlvehicleexhaust（排气；废气）4

6、.Tostrengthenafforestation（植树造林）,toexpandthegreenarea5.LimitthetotalareaofSO2emissions（排放量）6.IncreasepublicparticipationTheUnitedStatesandotherdevelopedcountries1.Internationaltreaties(条约)Anumberofinternationaltreatiesaboutatmosphericpollutionhavebeenagreed.CanadaandtheUSsignedtheAirQuali

7、tyAgreementin1991.MostEuropeancountriesandCanadahavesignedthetreaties.2.Emissions(排污权)tradingEmissionstradingisamarket-basedapproachusedtocontrolpollutionbyprovidingeconomicincentives（动机；刺激）forachievingreductionsintheemissionsofpollution3.Improvedautomotiveenginetec