2017关于空气污染的英语演讲稿

　　空气污染给我们的。身体健康带来了严重威胁。以下是小编带来的关于空气污染的英语演讲稿，希望对你有帮助。篇一：
　　Teachersstudents：
　　helloeverybody
　　TodayIlectureonthetopicofairpollution。Airpollutionisanewbranchofatmosphericscienceitistostudyindifferentweatherconditionsintotheatmosphereofthepollutantsintheatmospheretransmissiondilutediffusiontransformationandremovetheruleandapplicationofscience。Thissubjectoriginatedfromthe20XXs20xxyearsBritishatmosphericdiffusionexperimentwascarriedoutbutonlyinthe39；50sthedevelopmentofmodernindustryandcitypopulationishighlyconcentratedthereappearedtheseriousurbanorindustrialpollutioneventsinDecember20xx39；sLondonsmogeventforexampletookthelivesofmorethanfourthousandpeoplethesemakepeoplewideattentionandresearchofatmosphericpollutiontothe60sthengraduallyformedthisnewindependentdiscipline。
　　Airpollutionduetohumanactivityornaturalprocessandoutintotheatmosphereintosomeharmfulsubstances（pollutants）whentheamountofdischargedintoenough（pollutantconcentrationuptoalimit）makestheoriginalcleanairqualitytodropifthissituationismaintainedlongenoughwillbetohumansanimalsplantsandtheatmospherecauseharmandadverseeffectsoftheatmosphericstateknownasairpollution。Ofairpollutionhasthreeelements：theconcentrationofpollutionsourcesandpollutantsharmtohumanandbiological。
　　Cleantheatmosphereisoneofthenecessaryconditionsforthesurvivalofhumansinonepersoninfiveweeksnoeatingorfivedayswithoutdrinkingwatertobeabletosustainlifebutnotbreathingairformorethan5minutesthendiethebodytoabsorbeveryday1012cubicmeterofair。Thuseliminatingairpollutionorkeeppollutionconcentrationfallsbelowacertainlimitishowimportant。
　　Pollutionsourcesandpollutantsdischargedintothesourceofharmfulsubstancesintotheatmospherepollutionsourcesharmfulsubstancesintotheatmospherepollutants。Atmosphericpollutionsourcepointsofartificialandnaturalsources
　　Theharmofairpollutionandinfluence
　　Atmosphericpollutiononhumanandenvironmentcausedbytheharmandinfluencehasgraduallybeenrecognizedintheaggregatehasthefollowingseveralaspects：
　　（1）theharmtohumanhealth。Humansufferinghasthreepollutetheairsurfaceskincontactwiththeairinhaledandeatingfoodcontainingatmosphericpollutantsbesidescancauserespiratoryandlungdiseasesbutalsoonthecardiovascularsystemliveretcseriouscantakeawaythelife。
　　（2）theharmofbiological。Animalsbecauseoftheinhaledairpollutionoreatfoodscontainingcontaminantsanddiseaseordeathatmosphericpollutantscanmaketheplantdiseaseresistancedropinfluencethegrowthleafspotwitherordie。
　　（3）theharmofitems。Suchasthetextileclothingleathermetalproductsconstructionmaterialscultureartetc。chemicaldamageanddefileddamage。
　　（4）causeacidicprecipitationsuchasagricultureforestryfreshwateraquaculture。
　　（5）destroysthehighaltitudeozonelayerozoneholeformationcauseharmtohumanandbiologicalsurvivalenvironment。
　　6。Impactontheglobalclimatesuchastheincreaseincarbondioxideandothergreenhousegaseswillcausetheearth39；satmospherewarmsleadtoincreasedglobalweatherdisastersandaerosolparticlessuchassmokeincreasetheatmosphericturbiditysolarradiationaffectthelongwaveradiationtheearthmayleadtoabnormalweatherclimate。
　　Howtopreventionandcontrolofatmosphericpollutionreducetheharmofairpollutionandinfluenceconstituteamajorandurgentresearchsubject。Preventionandcontrolofatmosphericpollution
　　Preventionandcontrolofatmosphericpollutionisahugesystemengineeringneedtobeinpidualandcollectivenationalandthejointeffortsoftheworldcanconsidertotakemeasuresinthefollowingaspects：
　　（1）toreduceemissions。Usemorepollutionfreeenergy（suchassolarenergywindenergyhydroelectricpower）reformtheenergystructurewithlowpollutionenergy（suchasnaturalgas）pretreatmentoffuel（suchascoaldesulfurization）beforesuchasimprovingcombustiontechnologycanreduceemissions。Inadditionbeforethepollutantsintotheatmospherenotusedustsmokeabatementtechnologycondensingtechnologyliquidabsorptiontechnologyrecyclingtechnologytoeliminatesomepollutantsintheexhaustandcanreducetheamountofpollutantsintotheatmosphere。
　　（2）tocurbemissionsandmakefulluseofatmosphericselfpurificationability。Differentmeteorologicalconditionsthecapacityoftheatmosphericpollutantsintothesameamountofpollutantsthepollutantconcentrationwasdifferent。Forwindgoodventilationturbulencestrongconvectionareaandtimeatmosphericdiffusiondilutionabilityisstrongcanacceptmorecorporationstoinversionregionandtimeatmosphericdiffusiondilutionabilityisweakcannotacceptmorepollutantsotherwiseitwillcauseseriousairpollution。Thereforerespondtodifferentregionsdifferenttimesfortheeffectivecontrolofemissions。
　　（3）siteselectiondesignofchimneyurbanandindustrialplanningshouldbereasonabledon39；temitterstransitionconcentrationrepeatedsuperpositiondon39；tcausepollutionformationoflocalseriouspollutionincident。
　　（4）greeningafforestationmakemoreplantsabsorbpollutantsreduceatmosphericpollution。
　　Throughtheaboveexplanationweknowtheimportanceofairforourhumanrightfromnowonpleaseprotecttheenvironmentafforestationandcreateabetterlivingenvironment！
　　Todaymyspeechisthatundertheflagofthankyou。篇二：
　　1。PowerGeneration
　　Sitingfossilfuelpowerstationsinmainlyruralareasanddistributingthepollutionproducedmoreevenlyviatallchimneyshasresultedinimprovedurbanairqualitythoughtheystillremainamajorsourceofpollutionmainlysulphurdioxideandnitrogenoxides。
　　Betterdispersionofpollutantsemittedbytallchimneysleadstobetterdilutionintheairandthuslowerlocalconcentrationsofpollutants。Thishashoweverledtopollutionbeingdispersedmorewidelyandtotransboundaryairpollution。
　　2。OtherIndustryandwastedisposal
　　Althoughfossilfuelpowerplantsarethemajorsourceofindustrialairpollutioninmanycountriesallindustryandmanybusinesseslargeandsmallcanbesignificantlocalsourcesofawiderangeofairpollutants。
　　Allwastehasthepotentialtoaffecttheenvironmentadverselybycontaminatingtheairsoilorwater。Poorlymanagedwastedisposalsites（landfillorincineration）canalsoposeadangertopublichealththroughalltheseroutes。
　　3。RoadTransport
　　Airpollutionfrommotorvehicleshasinmanycountriesreplacedcoalsmokeasthemajorcauseforconcern；andthecontinuinggrowthinvehicleusemeansthateffortstoreduceemissionsfrominpidualvehiclesareindangerofbeingovertakenbyincreasesinthevolumeoftraffic。
　　Theairpollutantsproducedasaresultoftheuseofmotorvehiclespresentatwostageproblem：primaryandsecondarypollutants。Primarypollutantsproducedbypetrolpoweredvehiclesincludecarbonmonoxidenitricoxidebenzeneparticulatematterandlead。Muchoftheleademittedbyvehiclesburningleadedpetrolemergesasparticles。Secondarypollutantsproducedasaresultoftheuseofpetrolenginedvehiclesincludenitrogendioxideandozone。
　　4。DomesticSources
　　AstemperaturesacrosstheregionplummeteddomesticburningofcoalacrossnorthernChinabecomestheprimarysourceofairpollution。Otherimportantdomesticsourcesofairpollutionare：
　　Stovesandcookersproducecarbonmonoxide。IfventilationisinadequateorappliancespoorlymaintainedCOmayaccumulateindangerousconcentrations。Nitrogendioxideisalsogeneratedandconcentrationsinkitchenswillusuallyexceedthoseoutdoorswhencookersareinuse。
　　Bonfiresgardenincineratorsandbarbecuescanbeasignificantlocalsmokeandodournuisance。Burninggardenwasteproducessmokeespeciallyifitisdampandsmoulderingratherthandryandblazing。ThesmokecontainsCOandothernoxiousandirritatingcompounds。Problemsmaybecausedforasthmaticsbronchitissufferersorthosewithheartconditions。Eveniftheimmediatehealthriskissmallbonfiresaddtothegeneralbackgroundlevelofairpollution。
　　5。Agriculture
　　Agriculturalpracticescanalsobeasignificantsourceofnuisancecontributingbothtolocallevelsofairpollutionandcausingodourproblems。Themainsourcesofpollutionaretheburningofagriculturalwasteorofcropsinthefieldandlargeintensivelivestockunits。Dependingonsoiltypeandfertilisationthenitrogeninthedungandurineofgrazingcattlecontributes2040ofnitrousoxideemissionsfromagriculturalland；methaneisalsoemittedbycattleandotherruminants；nitrousoxideandmethaneareofcoursebothgreenhousegases。