关于globalwarming的presentation演讲稿

Firstofall,thankyouverymuch,Prof.Liu,fortheopportunityyougiveus.Itisaverygreatpleasureindeedforustomakeaconferencereportonthestage.MynameisJeremy,ChinesenameHebiao,amasterstudentfromSchoolofMechanicalEngineering,andourteamhasfivepeople,twoandmeinthesameacademy,theotherfromSchoolofTransportation.Today,ourpresentationis“GlobalWarming”.Wewillmakethispresentationfromthefollowingaspects.OK,letustakeajourney.Veniceisabeautifulwatercity,Venicelookslikeadolphin.Maldives,anislandcountryintheIndianOcean,isfamousforitstourismindustry.Somebeautifulpictures..Howeverbothofthetwoislandswillbecoveredbywateriftheglobalwarmingcontinueworkingorworseafterhalfancentury.So,ifyouwanttomakeaclosetouchwiththem,pleasecatchtime.Next,myworkmateswillshowsomeinformationdetailed.BeforeIexplainthetermof“GlobalWarming”,Iwanttosharesomepicturestoeveryone.Right,let'sgetstarted.Pleasedirectyourattentiontothescreen.Asyoucanseefromasetofphotosof“NASA”,duringthepastcentury,theLand-Oceantemperaturehasrisen0.8degreeCelsius，andthesealevelhasrisen7inches.Moreseriously,theindexwillcontinuetorisefaster.Accordingtotheindexofglobalgovernance,theaverageglobaltemperaturewillbe3.5degreeCelsiusabovenormalbytheendofthecentury.Inareport,scientistsworkingfortheUnitedNationsconcludedthatsealevelscouldriseby8to23inchesbytheendofthiscentury.Toreturntothemainsubject,GlobalwarmingisdefinedastheriseoftheaveragetemperatureoftheEarth'snear-surfacelayerofairaswellastheoceans,andextendstotheprojectedcontinuationofthatrise.Now,let'sswitchtothenextphotoof”CO2emissions”whichfromcarbondioxideInformationAnalysisCenter.Ascanbeseenbythefigure,Carbondioxideemissionsincreaseyearbyyearfromthemiddleofthelastcentury.ThecurrentCarbonDioxideemissionisfourtimesthantheemissionsfiftyyearsago.Whatistheconnectionofglobalwarmingandcarbondioxide?Carbondioxideisa'greenhousegas',aformofairpollutionwhichcausesglobalwarming.GlobalwarmingistheincreaseintheaveragetemperatureoftheEarth'snear-surfaceairandoceansinrecentdecadesanditsprojectedcontinuation.Thereasonaboutglobalwarmingareasfollows:1.TheforestresourcesinfactorsAroundtheworld,becauseofnaturalorman-madefactorscausingforestareaisgreatlyreduced2.AcidrainharmfactorsTheeffectsofacidraintotheecologicalenvironmenthavebeemoreandmoreattentionallovertheworld.Acidraincandestroyforest,acidificationlakes,endangerbiological,etc.Atpresent,theacidrainintheworldmoreconcentratedinEuropeandNorthAmerica,mostoftheacidrainoccurredindevelopedcountries,somedevelopingcountries,acidrain,alsointheoccurrenceanddevelopmentrapidly.ToxicwastepollutionfactorsGrowingtoxicchemicalsnotonlyposeaseriousthreattohumansurvival,butalsototheecologicalenvironmentoftheearth'ssurfacewillleadtoharm.WaterpollutionfactorsAccordingtotheglobalenvironmentmonitoringsystemforwaterqualitymonitoringprojectshowsthatabout10%oftheglobalmonitoringofthepollutionoftheriver,sincethiscentury,thehumanwaterconsumptionisdramaticallyincreased,atthesametime,waterpollution,scaleiscontinuallyexpanding.HumanactivitiesSincetheindustrialrevolution,humanactivitieswidelychangedtheshapeoftheearth'ssurfaceandthedistributionofplantsandanimals,especiallytheextensiveuseoffossilfuelsandotherwaystodischargealargeamountofgreenhousegasesintotheatmosphere.Thanksforlistening,thisisallformypresentation.Asweallknow,globalwarmingmeansnotonlythetemperatureofallpartsoftheworldtoincrease,butharmhuman'slifeaswell.Therearemanyaspectsofinfluence.Initially,naturaldisastershappenmorefrequent.Themaximumwindspeedsofthestrongesttropicalcycloneshaveincreasedsignificantlysince1981,accordingtoresearchpublishedinNaturethisweek.Andtheupwardtrend,thoughttobedrivenbyrisingoceantemperatures,isunlikelytostopatanytimesoon.Furthermore,ScientistspredictanincreaseinsealevelsworldwideduetothemeltingoftwomassiveicesheetsinAntarcticaandGreenland,especiallyontheEastoftheUS.However,manynationsaroundtheworldwillexperiencetheeffectsofrisingsea,whichcoulddisplacemillionsofpeople.Additionally,accordingtoresearchpublishedinNature,by2050,risingtemperaturescouldleadtotheextinctionofmorethanamillionspecies.Let'stalkaboutthedangersofglobalwarminginthepolarregion.Residentanimalslikepolar-bearandpenguinwilllosetheirhabitats;thesesmallpopulationsarehighlyvulnerabletoextinction.Forsomespecies,thefragmentedhabitatsbeetoosmalltosupportasustainablepopulation.Finally,globalwarmingalsocausedmassivecropfailures.“Climatechangeisexpectedtohavethemostsevereimpactonwatersupplies”,“Shortagesinfuturearelikelytothreatenfoodproduction,reducesanitation,hindereconomicdevelopmentanddamageecosystems.Itcausesmoreviolentswingsbetweenfloodsanddroughts.”Andsoon.Whatcanwedotopreventthesituationfromdeterioration?Soasmyteammatessaidtherearelotsofdangersabouttheglobalwarmingandthegreenhouseeffect,whatshouldwedotofacetheseproblems?Forthegovernment,Ithinkoursocietyshouldintroducesomepoliciestolimitmanyinappropriatebehaviorswhichwillcausetheglobalwarmingeasily.Weshouldbeencouragedtotakethepublictransports,insteaddrivingoutside,suchastakingthebus,metroorBRTwhenyougoout.Cleanenergyisalsoagoodchoiceinourdailylife,suchasthewindenergy,hydroelectricenergy,insteadthermalpowerusingfossilfuelorgasfromthenature,forthesefuelscausinglotsofcarbondioxideafterburning,andthisisthecrimeculpritwhichcausestheglobalwarming.Forus,wecandoalottoprotecttheearth.Closingthelightafterusing,whichistheeasiestthingwecandotoslowdowntheglobalwarmingandthegreenhouseeffect.ByusingAir-conditioninginahighfrequencywillacceleratetheprocessoftheglobalwarming.Sowecanheightenthetemperaturewhenweusingit,furthermorethebestwayisnotusingit.Remembertosaveallthethingswhenweusethem.Onlyintheseways,canwehaveagoodeffectwhenwefightfortheslowingglobalwarming.thealsoThat'sallourpresentation,thanksforwatchingandlistening.