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1、学号2009030350滨州学院论文翻译英文题目Vehicleemissionscontrol中文题目机动车排放控制（系）院飞行学院专业交通运输班级2009级2班学生姓名王根指导教师王海燕袁伟职称副教授助教2011年6月5日Vehicleemissionscontrol（Section）Vehicleemissionscontrolisthestudyandpracticeofreducingthemotorvehicleemissions--emissionsproducedbymotorvehicles,esp
2、eciallyinternalcombustionengines.Emissionsofmanyairpollutantshavebeenshowntohavevarietyofnegativeeffectsonpublichealthandthenaturalenvironment.Emissionsthatareprincipalpollutantsofconcerninclude:Hydrocarbons-Aclassofburnedorpartiallyburnedfuel,hydrocarbonsaret
3、oxinsandareamajorcontributortosmog,whichcanbeamajorprobleminurbanareas.Prolongedexposuretohydrocarbonscontributestoasthma,liverdisease,andcancer.Regulationsgoverninghydrocarbonsvaryaccordingtotypeofengineandjurisdiction;insomecases,"non-methanehydrocarbons"are
4、regulated,whileinothercases,"totalhydrocarbons"areregulated.Technologyforoneapplication(tomeetanon-methanehydrocarbonstandard)maynotbesuitableforuseinanapplicationthathastomeetatotalhydrocarbonstandard.Methaneisnottoxic,butismoredifficulttobreakdowninacatalyti
5、cconverter,soineffecta"non-methanehydrocarbon"standardcanbeconsideredtobelooser.Sincemethaneisagreenhousegas,interestisrisinginhowtoeliminateemissionsofit.Carbonmonoxide(CO)-Aproductofincompletecombustion,carbonmonoxidereducestheblood'sabilitytocarryoxygen;ove
6、rexposure(carbonmonoxidepoisoning)maybefatal.1.Historythroughoutthe1950sand1960s,variousfederal,stateandlocalgovernmentsintheUnitedStatesconductedstudiesintothenumeroussourcesofairpollution.Thesestudiesultimatelyattributedasignificantportionofairpollutiontothe
7、automobile,andconcludedairpollutionisnotboundedbylocalpoliticalboundaries.Atthattime,suchminimalemissioncontrolregulationsasexistedintheU.S.werepromulgatedatthemunicipalor,occasionally,thestatelevel.Theineffectivelocalregulationsweregraduallysupplantedbymoreco
8、mprehensivestateandfederalregulations.By1967theStateofCaliforniacreatedtheCaliforniaAirResourcesBoard,andin1970,thefederalUnitedStatesEnvironmentalProtectionAgencywasestablished.Bo
