绿色中国英语说绿色中国英语说 (9).ppt
Clean Waters and Green Mountains2.4 Climate ChangeGreen ChinaGreen ChinaObjectivesLearnthebasicknowledgeofClimateChange01Befamiliarwitheffortsdonetoprotecttheenvironmentfromclimatechange02industrialplantschoppingdowntreessoildepletionairpollutionIf we dont protect the nature,we cant protect ourselvesClimate ChangeClimate changeisdefinedasalongtermchangeintheEarthsoveralltemperaturewithmassiveandpermanentramifications.Theearthstemperaturedependsonthebalancebetweenenergyenteringandleavingtheplanetssystem.Climate Change1、Whensunlightreachestheearthssurface,itcaneitherbereflectedbackintospaceorabsorbedbytheearth.2、Incomingenergythatisabsorbedbytheearthwarmstheplanet.Onceabsorbed,theplanetreleasessomeoftheenergybackintotheatmosphereasheat.3、Solarenergythatisreflectedbacktospacedoesnotwarmtheearth.4、Certaingasesintheatmosphereabsorbenergy,slowingorpreventingthelossofheattospace.Thosegasesareknownas“greenhousegases”.Climate ChangeuAlittlegreenhouseeffectisnaturaltotheearthandisagoodthingtohave,thegasesactlikeablanket,makingtheearthwarmerthanitwouldotherwisebe.uButalargegreenhouseeffectcanbecatastrophiccausingalotofthatenergytostayinouratmosphereandheatuptheearthatanacceleratingrate.Climate ChangeKeygreenhousegases:CarbonDioxideMethaneNitrousOxidesGround-LevelOzoneWaterVaporAerosolsCFCsClimate ChangeSincetheIndustrialRevolution,humanactivitieshavereleasedlargeamountsofcarbondioxideandothergreenhousegasesintotheatmosphere.Naturalprocesses,suchaschangesinthesunsenergyandvolcaniceruptions,alsoaffecttheearthsclimate.Climate ChangeuOurcivilizationsproducedadevastating40billiontonsofcarbondioxideinoneyear.ItsenoughtofilltheentireGrandCanyonfivetimesoritstheequivalentof19millionEmpireStatebuildings.Climate ChangeuSomeofthemainhumanactivitythatamidstgreenhousegasesarefossilfuelburning,animalagriculture,anddeforestation.Effects of Climate ChangeuTheearthstemperaturehasrisen1.5degreesFahrenheitoverthepastcenturyandisprojectedtoriseanother0.5to8.6degreesFahrenheitoverthenext100years.uOceanacidificationharmsanimallifeandiswhatscausingthedeathoftheGreatBarrierReef.Sincetheoceansarebecomingwarmerthepolaricecapsaremeltingwhichhascausedalmost65percentofthepolaricecapstomelt.Effects of Climate ChangeuSince1979theearthlosesonaverage400billiontonsoficeeachyear,thatslikeagiantblockofice4mileslongoneachside,64cubicmilesthatmeltsandisaddedtotheocean.Effects of Climate ChangeuClimatechangealsocausesmorefrequentandintensenaturaldisasterssuchashurricanesfloodstornadoesheatwavesanddroughts.Effects of Climate ChangeWorlds efforts to fight climate changeuThe2021UnitedNationsClimateChangeConference,morecommonlyreferredtoasCOP26,washeldinGlasgow,Scotland,UnitedKingdom,from31Octoberto13November2021.COP26wasthemomentcountriesrevisitedtheclimatepledgesmadeunderthe2015ParisAgreement.uTwenty-fivethousanddelegatesfromnearly200countrieswereexpectedtoattend.Anewglobalagreement-theGlasgowClimatePact-wasreachedattheCOP26summit.Theagreement-althoughnotlegallybinding-settheglobalagendaonclimatechangeforthenextdecadelThe Glasgow Climate Pact The Glasgow Climate PactWorlds efforts to fight climate changeThepactReaffirmstheParisAgreementtemperaturegoalofholdingtheincreaseintheglobalaveragetemperaturetowellbelow2Candpursuingeffortstolimitthetemperatureincreaseto1.5C.Over140countriespledgedtoreachnet-zeroemissions.Thisincludes90%ofglobalGDP.lEmissionsWorlds efforts to fight climate changeForthefirsttimeataCOPconference,anexplicitplanwasmadetoreducetheuseofcoal-whichisresponsiblefor40%ofannualCO2emissions.lCoalWorlds efforts to fight climate changeLeadersfrommorethan100countries-withabout85%oftheworldsforests-promisedtostopdeforestationby2030.Thisisseenasvital,astressabsorbvastamountsofCO2.lTreesWorlds efforts to fight climate changeAschemetocut30%ofmethaneemissionsby2030wasagreedbymorethan100countries.lMethaneWorlds efforts to fight climate changeuChinahascommittedtopeakcarbondioxideemissionsbefore2030andachievecarbonneutralitybefore2060.Companiesintheconstruction,transportation,andironandsteelsectorsshouldplayaleadingroleinthetransition.Forexample,thetransportationsector,whichemittedabout1billionmetrictonsofcarbonneedstofindalternativefuelsandimproveenergyefficienttechnology.Worlds efforts to fight climate changeWorlds efforts to fight climate changeuThereisnoone-size-fits-allapproachtostoppingorslowingglobalwarming,andeachindividual,business,municipal,state,tribal,andfederalentitymustweightheiroptionsinlightoftheirownuniquesetofcircumstances.References1.https:/www.epa.gov/climate-change2.USGCRPChapter32017Figure3.1panel23.https:/unfccc.int/process-and-meetings/the-paris-agreement/the-glasgow-climate-pact-key-outcomes-from-cop26Task1.Fromthevideo,trytoanswerthefollowingquestions:WhatisthedifferencesbetweenCO2fromnowthanitwasin1920s?Whatishappeningtotherainforest?Whatwouldhappeniftheozonelayerdisappears?2.Finishthetaskintheattachedworddocument.
