2020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.Thissubjectoriginatedfromthe20xxs20yearsBritishatmosphericdiffusionexperimentwascarriedoutbutonlyinthe'50sthedevelopmentofmodernindustryandcitypopulationishighlyconcentratedthereappearedtheseriousurbanorindustrialpollutioneventsinDecember20'sLondonsmogeventforexampletookthelivesofmorethanfourthousandpeoplethesemakepeoplewideattentionandresearchofatmosphericpollutiontothe60sthengraduallyformedthisnewindependentdiscipline.

Airpollutionduetohumanactivityornaturalprocessandoutintotheatmosphereintosomeharmfulsubstances(pollutants)whentheamountofdischargedintoenough(pollutantconcentrationuptoalimit)makestheoriginalcleanairqualitytodropifthissituationismaintainedlongenoughwillbetohumansanimalsplantsandtheatmospherecauseharmandadverseeffectsoftheatmosphericstateknownasairpollution.Ofairpollutionhasthreeelements:theconcentrationofpollutionsourcesandpollutantsharmtohumanandbiological.

Cleantheatmosphereisoneofthenecessaryconditionsforthesurvivalofhumansinonepersoninfiveweeksnoeatingorfivedayswithoutdrinkingwatertobeabletosustainlifebutnotbreathingairformorethan5minutesthendiethebodytoabsorbeveryday10-12cubicmeterofair.Thuseliminatingairpollutionorkeeppollutionconcentrationfallsbelowacertainlimitishowimportant.

Pollutionsourcesandpollutantsdischargedintothesourceofharmfulsubstancesintotheatmospherepollutionsourcesharmfulsubstancesintotheatmospherepollutants.Atmosphericpollutionsourcepointsofartificialandnaturalsources

Theharmofairpollutionandinfluence

Atmosphericpollutiononhumanandenvironmentcausedbytheharmandinfluencehasgraduallybeenrecognizedintheaggregatehasthefollowingseveralaspects:

(1)theharmtohumanhealth.Humansufferinghasthreepollutetheairsurfaceskincontactwiththeairinhaledandeatingfoodcontainingatmosphericpollutantsbesidescancauserespiratoryandlungdiseasesbutalsoonthecardiovascularsystemliveretcseriouscantakeawaythelife.

(2)theharmofbiological.Animalsbecauseoftheinhaledairpollutionoreatfoodscontainingcontaminantsanddiseaseordeathatmosphericpollutantscanmaketheplantdiseaseresistancedropinfluencethegrowthleafspotwitherordie.

(3)theharmofitems.Suchasthetextileclothingleathermetalproductsconstructionmaterialscultureartetc.chemicaldamageanddefileddamage.

(4)causeacidicprecipitationsuchasagricultureforestryfreshwateraquaculture.

(5)destroysthehigh-altitudeozonelayerozoneholeformationcauseharmtohumanandbiologicalsurvivalenvironment.

6.Impactontheglobalclimatesuchastheincreaseincarbondioxideandothergreenhousegaseswillcausetheearth'satmospherewarmsleadtoincreasedglobalweatherdisastersandaerosolparticlessuchassmokeincreasetheatmosphericturbiditysolarradiationaffectthelongwaveradiationtheearthmayleadtoabnormalweatherclimate.

Howtopreventionandcontrolofatmosphericpollutionreducetheharmofairpollutionandinfluenceconstituteamajorandurgentresearchsubject.Preventionandcontrolofatmosphericpollution

Preventionandcontrolofatmosphericpollutionisahugesystemengineeringneedtobeindividualandcollectivenationalandthejointeffortsoftheworldcanconsidertotakemeasuresinthefollowingaspects:

(1)toreduceemissions.Usemorepollution-freeenergy(suchassolarenergywindenergyhydroelectricpower)reformtheenergystructurewithlowpollutionenergy(suchasnaturalgas)pretreatmentoffuel(suchascoaldesulfurization)beforesuchasimprovingcombustiontechnologycanreduceemissions.Inadditionbeforethepollutantsintotheatmospherenotusedustsmokeabatementtechnologycondensingtechnologyliquidabsorptiontechnologyrecyclingtechnologytoeliminatesomepollutantsintheexhaustandcanreducetheamountofpollutantsintotheatmosphere.

(2)tocurbemissionsandmakefulluseofatmosphericself-purificationability.Differentmeteorologicalconditionsthecapacityoftheatmosphericpollutantsintothesameamountofpollutantsthepollutantconcentrationwasdifferent.Forwindgoodventilationturbulencestrongconvectionareaandtimeatmosphericdiffusiondilutionabilityisstrongcanacceptmorecorporationstoinversionregionandtimeatmosphericdiffusiondilutionabilityisweakcannotacceptmorepollutantsotherwiseitwillcauseseriousairpollution.Thereforerespondtodifferentregionsdifferenttimesfortheeffectivecontrolofemissions.

(3)siteselectiondesignofchimneyurbanandindustrialplanningshouldbereasonabledon'temitterstransitionconcentrationrepeatedsuperpositiondon'tcausepollutionformationoflocalseriouspollutionincident.

(4)greeningafforestationmakemoreplantsabsorbpollutantsreduceatmosphericpollution.

Throughtheaboveexplanationweknowtheimportanceofairforourhumanrightfromnowonpleaseprotecttheenvironmentafforestationandcreateabetterlivingenvironment!

Todaymyspeechisthatundertheflagofthankyou.

篇二：

1.PowerGeneration

Sitingfossilfuelpowerstationsinmainlyruralareasanddistributingthepollutionproducedmoreevenlyviatallchimneyshasresultedinimprovedurbanairqualitythoughtheystillremainamajorsourceofpollutionmainlysulphurdioxideandnitrogenoxides.

Betterdispersionofpollutantsemittedbytallchimneysleadstobetterdilutionintheairandthuslowerlocalconcentrationsofpollutants.Thishashoweverledtopollutionbeingdispersedmorewidelyandtotransboundaryairpollution.

2.OtherIndustryandwastedisposal

Althoughfossilfuelpowerplantsarethemajorsourceofindustrialairpollutioninmanycountriesallindustryandmanybusinesseslargeandsmallcanbesignificantlocalsourcesofawiderangeofairpollutants.

Allwastehasthepotentialtoaffecttheenvironmentadverselybycontaminatingtheairsoilorwater.Poorlymanagedwastedisposalsites(landfillorincineration)canalsoposeadangertopublichealththroughalltheseroutes.

3.RoadTransport

Airpollutionfrommotorvehicleshasinmanycountriesreplacedcoalsmokeasthemajorcauseforconcern;andthecontinuinggrowthinvehicleusemeansthateffortstoreduceemissionsfromindividualvehiclesareindangerofbeingovertakenbyincreasesinthevolumeoftraffic.

Theairpollutantsproducedasaresultoftheuseofmotorvehiclespresentatwo-stageproblem:primaryandsecondarypollutants.Primarypollutantsproducedbypetrol-poweredvehiclesincludecarbonmonoxidenitricoxidebenzeneparticulatematterandlead.Muchoftheleademittedbyvehiclesburningleadedpetrolemergesasparticles.Secondarypollutantsproducedasaresultoftheuseofpetrol-enginedvehiclesincludenitrogendioxideandozone.

4.DomesticSources

AstemperaturesacrosstheregionplummeteddomesticburningofcoalacrossnorthernChinabecomestheprimarysourceofairpollution.Otherimportantdomesticsourcesofairpollutionare:

Stovesandcookersproducecarbonmonoxide.IfventilationisinadequateorappliancespoorlymaintainedCOmayaccumulateindangerousconcentrations.Nitrogendioxideisalsogeneratedandconcentrationsinkitchenswillusuallyexceedthoseoutdoorswhencookersareinuse.

Bonfiresgardenincineratorsandbarbecuescanbeasignificantlocalsmokeandodournuisance.Burninggardenwasteproducessmokeespeciallyifitisdampandsmoulderingratherthandryandblazing.ThesmokecontainsCOandothernoxiousandirritatingcompounds.Problemsmaybecausedforasthmaticsbronchitissufferersorthosewithheartconditions.Eveniftheimmediatehealthriskissmallbonfiresaddtothegeneralbackgroundlevelofairpollution.

5.Agriculture

Agriculturalpracticescanalsobeasignificantsourceofnuisancecontributingbothtolocallevelsofairpollutionandcausingodourproblems.Themainsourcesofpollutionaretheburningofagriculturalwasteorofcropsinthefieldandlargeintensivelivestockunits.Dependingonsoiltypeandfertilisationthenitrogeninthedungandurineofgrazingcattlecontributes20-40%ofnitrousoxideemissionsfromagriculturalland;methaneisalsoemittedbycattleandotherruminants;nitrousoxideandmethaneareofcoursebothgreenhousegases.