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UnitThree
Recycling1整理课件NavigationGuideI.RelatedInformation1.1BackgroundInformation1.2PreviewQsII.TextComprehension2.1ComprehensionQs2.2TextAnalysisIII.DifficultPoints3.1KeyWords3.2KeyPhrasesIV.HomeReading4.1Post-readingQs4.2Difficultsentences2整理课件Objectives:
Toknowsomeseriousproblemsthreateningthesurvivalofhumanbeings.Tobeawareoftheissuesconcerningenvironmentalprotection.Tounderstandthewaystosolvetheenvironmentalproblems3整理课件4整理课件5整理课件Unwantedoruselessmaterials.6整理课件Theprocessofcollectingmaterialsthatareconsideredtrashandremanufacturingthemintonewproductsthatcanberesoldandusedagain.7整理课件conservesnaturalresourcesSavesenergyProduceslessgreenhousePreventsthedestructionofnaturalhabitatsDecreasessoilerosionassociatedwithminingandlogging8整理课件Let’ssee!9整理课件GlassMetalPaperPlasticTires10整理课件MostwidelyusedproductsintheU.S.Takesupabout10%ofourtotalstream
anditiscomposedmainlyofthenon-renewableresourcepetroleum.Recyclingoldplasticproductsuses20%-40%lessenergythanmanufacturingitfromnew.11整理课件7differenttypesofplasticPETorPETE(PolyethyleneTerephthalate)HDPE(high-densitypolyethylene)SodaandwaterbottlesMouthwashbottlesPlasticwrapPeanutbetterandotherfoodjarsSaladdressingbottlesMilkcontainersTrashbagsYogurtcontainersLiquidlaundrydetergentcontainersShampoobottlesJuicecontainersRecycledPlastic:Reducesgreenhousegasemission/canbemadeintoplasticlumber,whichisdurable12整理课件Americansuseover100millionsteelcansandover200millionaluminumbeveragecanseveryday.MainlyaluminumandsteelProductsuses95%lessenergythanmanufacturingitfromnewmaterials.Aluminumisanore,whichisamineral.LesslandandWaterpollutions13整理课件Theprocessofmanufacturingoldpaperproductsandturningthemintonew,reusablepaperproducts.Recyclingoldpaperproductsuses60%lessenergythanmanufacturingitfromnewmaterials.MostrecognizedrecycledpaperproductsAfterrecycled,cancreate…NewspaperShreddedpaperPhonebooksCardboardMagazinesComputerpaperEggcartonsPapertowelTissueToiletpaperNewspaperPhonebooks14整理课件Theprocessoftakingoldglassproductsandturningthemintonew,reusableglassproducts.Recyclingoldglassuses40%lessenergythanmanufacturingitfromnew.TYPESofGlassProductscanberecycledBeveragecontainersFoodJarsBenefitsofrecyclingofRecyclingglassCanberecycledoveragainandneverloseitsqualityorquantityCreates20%lessairpollutionReduceswaterpollutionby50%Savesenergytolighta100-wattlightbulbReducesthatamountoflandfillspacethatisused15整理课件I.RelatedInformation
1)
EnvironmentThephysicalsurroundingsofanorganismororganisms,includingbiological,physical,andchemicalfactors.Inthecontextofhumanecology,italsoincludessocialandculturalsurroundings.Planning,caringfor,andconservationofthehumanenvironment,bothbuiltandnatural,becameofincreasingconcernintheyearsfollowingWorldWar
16整理课件Recyclinginvolvesprocessingusedmaterialsintonewproductstopreventwasteofpotentiallyusefulmaterials,reducetheconsumptionoffreshrawmaterials,reduceenergyusage,reduceairpollution(fromincineration)andwaterpollution(fromlandfilling)byreducingtheneedfor"conventional"wastedisposal,andlowergreenhousegasemissionsascomparedtovirginproduction.[1][2]Recyclingisakeycomponentofmodernwastereductionandisthethirdcomponentofthe"Reduce,Reuse,Recycle"wastehierarchy.17整理课件Recyclablematerialsincludemanykindsofglass,paper,metal,plastic,textiles,andelectronics.Althoughsimilarineffect,thecompostingorotherreuseofbiodegradablewaste
–suchasfoodorgardenwaste
–isnottypicallyconsideredrecycling.[2]Materialstoberecycledareeitherbroughttoacollectioncenterorpickedupfromthecurbside,thensorted,cleaned,andreprocessedintonewmaterialsboundformanufacturing.18整理课件19整理课件Earth’spressWhatshouldwedo?20整理课件RecyclingInChina21整理课件Whatcanwedowithregardtorecycling●节约用水●拒绝使用塑料袋●将空调的温度下调1度●尽量使用可再生能源●购买当地的有机食品●关掉多余的灯●送绿色礼物●纸张两面用●手机以旧换新●减少废物,专家建议,尽量购买散装货,买散装水果和蔬菜,不买那些使用多层塑料纸包装的物品,购买那些容易降解的物品22整理课件Well,recyclingisasimple
waythatyou,asaconsumer,canhelp
outtheenvironment,createaprofitablemarketforrecycledgoodsandhelppreserve
naturalresourcesfrombeingdepleted(耗尽…的资源deplete的过去分词).So…let’sgetinvolved!23整理课件Let’sjoinhandstoprotectourhome--EARTH24整理课件1.Futuresourcesofpower
Fossilfuels,chieflycoal,oilandnaturalgas,nowsupplymostofourenergy.Onlyasmallamountcomesfromrenewablesourceslikesolarorwindpower,whichdonotreleasegasesthattrapheatintheatmosphere.Ifwecouldgetmoreofourenergyfromrenewablesources,wecouldreducetheamountoffossilfuelsweburn.
Renewablesourcescouldprovide40percentoftheenergyneededintheworldbytheyear2050.Useofrenewableenergycanhelpbothtoslowglobalwarmingandtoreduceairpollution.25整理课件2.Energyefficiency
Anenergy-efficientlightbulborappliancedoesthesamejobwithlessenergy.Thesavedenergycanbeusedelsewhere,likeanyothersourceofpower.
26整理课件3.WhatbusinessescandotosaveenergyInvestinenergy-efficientfluorescentlighting.Buildorremodelofficesusingenergy-efficientmaterials,properinsulationandsolarenergyforheatingandlighting.Setupride-sharingsystemsforemployeeswhocommutetowork.Planttreestooffsetthecompany'sgreenhousegasemissions.Investinenergy-efficientmanufacturingprocessesandequipment.Userecycledmaterials.Establishrecyclingprogramsintheworkplaceanduserecycledpaperproducts.27整理课件4.NuclearPowerintheWorldTodayThefirstcommercialnuclearpowerstationsstartedoperationinthe1950s.Therearenowsome440commercialnuclearreactorsin31countries,withover350,000MWoftotalcapacity.Theysupply16%oftheworld'selectricity,asbase-loadpower,andtheirefficiencyisincreasing.56countriesoperateatotalof284researchreactors.Canadaistheworld'sleadingsupplierofuranium.28整理课件languagepoints1.CurbsiderecyclingcollectionprogramsreachthemajorityoftheAmericanpopulation.美国大多数人口参与了路边回收项目。29整理课件3.Isrecyclingworthalltheeffort?Isprofitabilitytheonlybottomline?利益是唯一的底线吗?4.currentprofitability现行利益,当前利益•
Marketsforcollectedrecyclablesgoupanddown..回收市场不稳定。6.sustainability可持续性7.massproduction大批量生产30整理课件8.economicnecessity经济的必需9.EarthDay地球日10.TheU.S.EnvironmentalProtectionAgency美国环保署11.Otherobserverssuggestedabroaderviewofthecostsandbenefitsofrecycling.一些观察家建议用长远的眼光看待回收利用的成本与收益。12.Theperspectivefocusessolelyonhowanindividualrecyclingprogramimpactsacommunity'stotalwastemanagementcosts,comparedtothealternativeofsendingeverythingtoalandfillorincinerator.31整理课件13.Recyclingisnotafad.14.Withthisabundancecameanincreasingtendencytodiscardandreplaceproductsaftertheirinitialuse,ratherthattoreuseorrecyclethem.15.Governmentagenciesatalllevelshaveworkedtoensurerecycling'sviability.[practicability可行性]32整理课件Discussingthefollowingtopics.
1.
Whatisthegreenhouseeffect?Canyougiveexamplesofthegreenhouseeffectintheplaceyoulive?
2.
Discusshowairpollutionandwaterpollutionhaveaffectedourdailylife.3.Whatcanwedotoimproveourenvironment?
33整理课件1.Gasesintheatmosphere(suchaswatervapor,carbondioxide,methane,andchlorofluorocarbons,orCFCs)absorbinfra-redradiationfromtheEarth'ssurfaceandreflectitbackontotheplanet.Butthe"greenhousegases"sendsomeofthisheatbacktowardstheEarth'ssurfaceandhelptokeepitwarm.
Carbondioxideisreleasedbecauseofthedeforestationandburningofvastquantitiesofsuchfossilfuelsascoal,gas,andoil.Andothergreenhousegasescomefromtheuseofcar,chemicalfertilizers,refrigeratorsandfreezers.34整理课件2.Airpollutioncandamagepeople'slungsandtheleadfromsomecarexhaustfumescancauseacidrainwhichisveryharmfultothelivingbeingsaswellasthebuildings.
Thepollutedwaterinriversandstreamscankillfish,otherwateranimalsandplants.Itcankillseabirds,shellfishandotherwildlifewhenitflowsintothesea.Thewaterfromthepower-stationsforcoolingmaynotonlykillfishandotherwateranimalsbutalsopreventthemfrombreeding.
35整理课件3.Toimproveourenvironment,weshouldproducelessofgasestoslowthegreenhouseeffect,uselessfuelslikepetrol,oil,naturalgasandcoal,reducetheuseofCFCs,developmoreefficientheatingsystemsandengines.36整理课件Home-reading37整理课件2.2TextAnalysisPartOneTheGreenhouseEffect38整理课件DivisionParagraphMainIdeaPartIP1PartIIP2-p7PartIIIP8-p11PartIVP12-p13PartVP14-p16PartVIP1739整理课件PartOneTheGreenhouseEffect
ComprehensionQsWhatisthegreenhouseeffect?Wheredogreenhousegasescomefrom?Whatarethesolutiontothegreenhouseeffect?40整理课件PartTwoAirPollutionand
AcidRain
Howistheairpollutioncaused?Howdoesacidraindestroyourenvironment?Arethereanypracticalwaystopreventtheacidrain?Whatarethey?Howdoyouthinkoftheeffect?41整理课件PartThreeTheOzoneHoleHowdoestheozonelayerprotecthumanbeings?Whathasbeendestroyingtheozonelayer?Whereismoredangerousatcertaintimeofayear?42整理课件PartFourPollutionofRivers,
lakesandtheSea
Howaretheriverspolluteddirectly?Whatwillhappentotheseaanimalsandotherwildlife?Whyisthewarmwatermoredangerousthanthecoolwater?43整理课件1.Thesunisthemostimportantsourceofenergythattheearthhas.
(太阳是地球最重要的能量之源。)
注意在定语从句中,当先行项带有最高级修饰语时,其后的关系代词通常用that。
e.g.Newtonwasoneofthegreatestmenthateverlived.
He'sthecleverestmanthatIhaveevermet.
此外,在以下情况中,定语从句的关系代词一般也用that。
(1)当先行项带有only,all,any等限定词时。
e.g.Youaretheonlypersonthatcanhelpme.
Anyboythatwantstosucceedmustworkhard.
AskMr.Green,oranyotherpersonthatislikelytoknow.
(2)当先行项为all或其他指物的不定代词如anything,something,nothing,且关系代词在定语从句中做主语时。
e.g.Allthatglittersisnotgold.
Thismonumentisallthatremainsoftheancientcity.
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