保护环境_专业英文ppt课件

Whatdoesourearthlooklike?Howisourlivingenvironment?,1,Everybodyknowswastepaperandusedcokecansarediscardedeverywhere.Youmighthaveseenplasticbagsflyingintheskyandgettingcaughtinthetreeswhenthewindblowsormaybeyouhaveseenoldcansfloatingintheriversandpollutingthewater.Ourenvironmentistheplaceinwhichwelive,butitisbeingruinedbyus.,2,Airpollutionisbecomingasevereproblem,whichmainlycausedbytransportactionandfactoriesproduction.Theairpollutionchangestheconditionsthatwedependon,suchasthegreenhouseeffectandtheacidrain.Itcausesmanydiseases,too.,3,Waterpollutionisthecontaminationofwaterbodiessuchaslakes,rivers,oceans,lagoons,andgroundwater.Allwaterpollutionaffectsorganismsandplantsthatliveinthesebodiesofwaterandinalmostallcasestheeffectisdamagingeithertoindividualspeciesandpopulationsbutalsotothenaturalbiologicalcommunities.Itoccurswhenpollutantsaredischargeddirectlyorindirectlyintowaterbodieswithoutadequatetreatmenttoremoveharmfulconstituents.,4,ThegloblewarmingIncreasingglobaltemperaturewillcausesealevelstoriseandwillchangetheamountandpatternofprecipitation,includinganexpanseofthesubtropicaldesertregions.Otherlikelyeffectsincludeincreasesintheintensityofextremeweatherevents,changesinagriculturalyields,modificationsoftraderoutes,glacierretreat,speciesextinctionsandincreasesintherangesofdiseasevectors.,5,Alargenumberofforestshavebeensacrificedforurbandevelopment.Asweallknow,treesareabletohelpcleantheair.Furthermore,wearekillinganimalswhilecuttingdownthesetrees.Asaresult,manyanimalspeciesaredyingout.Airpollutionisgettingworse,whichcancausemanydiseases.peoplestillgooncuttingdowntrees.,6,Andwhatshouldwedo?,Whatdoesourearthlooklike?,7,Energyconservation,UsegreenshoppingbagsinsteadofplasticsTurnoffthelightbeforeyougetoutRaisethetemperatureofair-conditioningRideabicycle,ortotakeabusinsteadofacarTurndownthebrightnessandvoiceofyourcomputer,8,Waterconservation,RecyclingofwaterUseawashbasinwhenyouwashandbrushDischargesewageaftertreatment,9,Plantmoretrees;protecttheforestsandalltheanimalsUseofrenewablematerialsRestricttheuseofprivatecarsImplementofsustainableeconomicdevelopment,10,Thebeautifulplanetofoursisourhome.T