(化石燃料).ppt

GlobalWarming,Unit4,Warmingup,Fossilfuel化石燃料Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy;alsoknownasnon-renewableenergybecauseoncetheyareusedtheyhavegoneforever;theycannotberenewed.,Whatarefossilfuels,Fromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.,windmills,acoalpowerstation,,anoilrefinery,anuclearpowerplant,solarpanels,ahydro-electricdam,Samplelists,lightheatingtelevisioncassetteplayervideorecorder,oil,coal,naturalgas,windwindpower,sunsolarenergy,renewable,renewable,non-renewable,non-renewable,non-renewable,fridge,stove,washingmachine,hair-dryer,waterhydro-electric,renewable,plantwastebiomassenergy,renewable,hotspringsorgeysersgeothermalenergy,renewable,theseatidalenergy,renewable,computer,uraniumnuclearenergy,non-renewable,Renewableornon-renewable,√,Renewableornon-renewable,√,Whatistoldinthepicture,non-renewableenergysource,NotestoRenewableenergyRenewableenergyresourcesmaybeuseddirectly,orusedtocreateothermoreconvenientsofenergy.Examplesofdirectusearesolarovens,geothermal地温heating,andwaterandwindmills.,Examplesofindirectusewhichrequireenergyharvestingareelectricitygenerationthroughwindturbines涡轮orphotovoltaic光电的cells,orproductionoffuelssuchasethanol酒精frombiomass生物量.,RenewableenergysourcesorREScapturetheirenergyfromexistingflowsofenergy,fromon-goingnaturalprocesses,suchassunshine,wind,flowingwater,biologicalprocesses,andgeothermalheatflows.,Mostrenewableenergy,otherthangeothermalandtidalpower,ultimately基本上comefromtheSun.Somesarestoredsolarenergysuchasrainfallandwindpowerwhichareconsideredshort-termsolar-energystorage,,whereastheenergyinbiomass生物量isaccumulated积聚overaperiodofmonths,asinstraw,orthroughmanyyearsasinwood.,Capturingrenewableenergybyplants,animalsandhumansdoesnotpermanentlydeplete耗尽theresource.Fossilfuels,whiletheoreticallyrenewableonaverylongtime-scale,areexploitedatratesthatmaydepletetheseresourcesinthenearfuture.,HomeworkReviewthenewwordsandexpressionsyoulearnedinthisclass.2.PreviewReading.,Thankyou,