英語泛讀教程 unit 3 recycling

UnitThree

Recycling1整理課件NavigationGuideI.RelatedInformation1.1BackgroundInformation1.2PreviewQsII.TextComprehension2.1ComprehensionQs2.2TextAnalysisIII.DifficultPoints3.1KeyWords3.2KeyPhrasesIV.HomeReading4.1Post-readingQs4.2Difficultsentences2整理課件Objectives:

Toknowsomeseriousproblemsthreateningthesurvivalofhumanbeings.Tobeawareoftheissuesconcerningenvironmentalprotection.Tounderstandthewaystosolvetheenvironmentalproblems3整理課件4整理課件5整理課件Unwantedoruselessmaterials.6整理課件Theprocessofcollectingmaterialsthatareconsideredtrashandremanufacturingthemintonewproductsthatcanberesoldandusedagain.7整理課件conservesnaturalresourcesSavesenergyProduceslessgreenhousePreventsthedestructionofnaturalhabitatsDecreasessoilerosionassociatedwithminingandlogging8整理課件Let’ssee!9整理課件GlassMetalPaperPlasticTires10整理課件MostwidelyusedproductsintheU.S.Takesupabout10%ofourtotalstream

anditiscomposedmainlyofthenon-renewableresourcepetroleum.Recyclingoldplasticproductsuses20%-40%lessenergythanmanufacturingitfromnew.11整理課件7differenttypesofplasticPETorPETE(PolyethyleneTerephthalate)HDPE(high-densitypolyethylene)SodaandwaterbottlesMouthwashbottlesPlasticwrapPeanutbetterandotherfoodjarsSaladdressingbottlesMilkcontainersTrashbagsYogurtcontainersLiquidlaundrydetergentcontainersShampoobottlesJuicecontainersRecycledPlastic:Reducesgreenhousegasemission/canbemadeintoplasticlumber,whichisdurable12整理課件Americansuseover100millionsteelcansandover200millionaluminumbeveragecanseveryday.MainlyaluminumandsteelProductsuses95%lessenergythanmanufacturingitfromnewmaterials.Aluminumisanore,whichisamineral.LesslandandWaterpollutions13整理課件Theprocessofmanufacturingoldpaperproductsandturningthemintonew,reusablepaperproducts.Recyclingoldpaperproductsuses60%lessenergythanmanufacturingitfromnewmaterials.MostrecognizedrecycledpaperproductsAfterrecycled,cancreate…NewspaperShreddedpaperPhonebooksCardboardMagazinesComputerpaperEggcartonsPapertowelTissueToiletpaperNewspaperPhonebooks14整理課件Theprocessoftakingoldglassproductsandturningthemintonew,reusableglassproducts.Recyclingoldglassuses40%lessenergythanmanufacturingitfromnew.TYPESofGlassProductscanberecycledBeveragecontainersFoodJarsBenefitsofrecyclingofRecyclingglassCanberecycledoveragainandneverloseitsqualityorquantityCreates20%lessairpollutionReduceswaterpollutionby50%Savesenergytolighta100-wattlightbulbReducesthatamountoflandfillspacethatisused15整理課件I.RelatedInformation

1)

EnvironmentThephysicalsurroundingsofanorganismororganisms,includingbiological,physical,andchemicalfactors.Inthecontextofhumanecology,italsoincludessocialandculturalsurroundings.Planning,caringfor,andconservationofthehumanenvironment,bothbuiltandnatural,becameofincreasingconcernintheyearsfollowingWorldWar

16整理課件Recyclinginvolvesprocessingusedmaterialsintonewproductstopreventwasteofpotentiallyusefulmaterials,reducetheconsumptionoffreshrawmaterials,reduceenergyusage,reduceairpollution(fromincineration)andwaterpollution(fromlandfilling)byreducingtheneedfor"conventional"wastedisposal,andlowergreenhousegasemissionsascomparedtovirginproduction.[1][2]Recyclingisakeycomponentofmodernwastereductionandisthethirdcomponentofthe"Reduce,Reuse,Recycle"wastehierarchy.17整理課件Recyclablematerialsincludemanykindsofglass,paper,metal,plastic,textiles,andelectronics.Althoughsimilarineffect,thecompostingorotherreuseofbiodegradablewaste

–suchasfoodorgardenwaste

–isnottypicallyconsideredrecycling.[2]Materialstoberecycledareeitherbroughttoacollectioncenterorpickedupfromthecurbside,thensorted,cleaned,andreprocessedintonewmaterialsboundformanufacturing.18整理課件19整理課件Earth’spressWhatshouldwedo?20整理課件RecyclingInChina21整理課件Whatcanwedowithregardtorecycling●節(jié)約用水●拒絕使用塑料袋●將空調(diào)的溫度下調(diào)1度●盡量使用可再生能源●購買當(dāng)?shù)氐挠袡C(jī)食品●關(guān)掉多余的燈●送綠色禮物●紙張兩面用●手機(jī)以舊換新●減少廢物，專家建議，盡量購買散裝貨，買散裝水果和蔬菜，不買那些使用多層塑料紙包裝的物品，購買那些容易降解的物品22整理課件Well,recyclingisasimple

waythatyou,asaconsumer,canhelp

outtheenvironment,createaprofitablemarketforrecycledgoodsandhelppreserve

naturalresourcesfrombeingdepleted(耗盡…的資源deplete的過去分詞).So…let’sgetinvolved!23整理課件Let’sjoinhandstoprotectourhome--EARTH24整理課件1.Futuresourcesofpower

Fossilfuels,chieflycoal,oilandnaturalgas,nowsupplymostofourenergy.Onlyasmallamountcomesfromrenewablesourceslikesolarorwindpower,whichdonotreleasegasesthattrapheatintheatmosphere.Ifwecouldgetmoreofourenergyfromrenewablesources,wecouldreducetheamountoffossilfuelsweburn.

Renewablesourcescouldprovide40percentoftheenergyneededintheworldbytheyear2050.Useofrenewableenergycanhelpbothtoslowglobalwarmingandtoreduceairpollution.25整理課件2.Energyefficiency

Anenergy-efficientlightbulborappliancedoesthesamejobwithlessenergy.Thesavedenergycanbeusedelsewhere,likeanyothersourceofpower.

26整理課件3.WhatbusinessescandotosaveenergyInvestinenergy-efficientfluorescentlighting.Buildorremodelofficesusingenergy-efficientmaterials,properinsulationandsolarenergyforheatingandlighting.Setupride-sharingsystemsforemployeeswhocommutetowork.Planttreestooffsetthecompany'sgreenhousegasemissions.Investinenergy-efficientmanufacturingprocessesandequipment.Userecycledmaterials.Establishrecyclingprogramsintheworkplaceanduserecycledpaperproducts.27整理課件4.NuclearPowerintheWorldTodayThefirstcommercialnuclearpowerstationsstartedoperationinthe1950s.Therearenowsome440commercialnuclearreactorsin31countries,withover350,000MWoftotalcapacity.Theysupply16%oftheworld'selectricity,asbase-loadpower,andtheirefficiencyisincreasing.56countriesoperateatotalof284researchreactors.Canadaistheworld'sleadingsupplierofuranium.28整理課件languagepoints1.CurbsiderecyclingcollectionprogramsreachthemajorityoftheAmericanpopulation.美國大多數(shù)人口參與了路邊回收項(xiàng)目。29整理課件3.Isrecyclingworthalltheeffort?Isprofitabilitytheonlybottomline?利益是唯一的底線嗎？4.currentprofitability現(xiàn)行利益，當(dāng)前利益?

Marketsforcollectedrecyclablesgoupanddown..回收市場(chǎng)不穩(wěn)定。6.sustainability可持續(xù)性7.massproduction大批量生產(chǎn)30整理課件8.economicnecessity經(jīng)濟(jì)的必需9.EarthDay地球日10.TheU.S.EnvironmentalProtectionAgency美國環(huán)保署11.Otherobserverssuggestedabroaderviewofthecostsandbenefitsofrecycling.一些觀察家建議用長遠(yuǎn)的眼光看待回收利用的成本與收益。12.Theperspectivefocusessolelyonhowanindividualrecyclingprogramimpactsacommunity'stotalwastemanagementcosts,comparedtothealternativeofsendingeverythingtoalandfillorincinerator.31整理課件13.Recyclingisnotafad.14.Withthisabundancecameanincreasingtendencytodiscardandreplaceproductsaftertheirinitialuse,ratherthattoreuseorrecyclethem.15.Governmentagenciesatalllevelshaveworkedtoensurerecycling'sviability.[practicability可行性]32整理課件Discussingthefollowingtopics.

1.

Whatisthegreenhouseeffect?Canyougiveexamplesofthegreenhouseeffectintheplaceyoulive?

2.

Discusshowairpollutionandwaterpollutionhaveaffectedourdailylife.3.Whatcanwedotoimproveourenvironment?

33整理課件1.Gasesintheatmosphere(suchaswatervapor,carbondioxide,methane,andchlorofluorocarbons,orCFCs)absorbinfra-redradiationfromtheEarth'ssurfaceandreflectitbackontotheplanet.Butthe"greenhousegases"sendsomeofthisheatbacktowardstheEarth'ssurfaceandhelptokeepitwarm.

Carbondioxideisreleasedbecauseofthedeforestationandburningofvastquantitiesofsuchfossilfuelsascoal,gas,andoil.Andothergreenhousegasescomefromtheuseofcar,chemicalfertilizers,refrigeratorsandfreezers.34整理課件2.Airpollutioncandamagepeople'slungsandtheleadfromsomecarexhaustfumescancauseacidrainwhichisveryharmfultothelivingbeingsaswellasthebuildings.

Thepollutedwaterinriversandstreamscankillfish,otherwateranimalsandplants.Itcankillseabirds,shellfishandotherwildlifewhenitflowsintothesea.Thewaterfromthepower-stationsforcoolingmaynotonlykillfishandotherwateranimalsbutalsopreventthemfrombreeding.

35整理課件3.Toimproveourenvironment,weshouldproducelessofgasestoslowthegreenhouseeffect,uselessfuelslikepetrol,oil,naturalgasandcoal,reducetheuseofCFCs,developmoreefficientheatingsystemsandengines.36整理課件Home-reading37整理課件2.2TextAnalysisPartOneTheGreenhouseEffect38整理課件DivisionParagraphMainIdeaPartIP1PartIIP2-p7PartIIIP8-p11PartIVP12-p13PartVP14-p16PartVIP1739整理課件PartOneTheGreenhouseEffect

ComprehensionQsWhatisthegreenhouseeffect?Wheredogreenhousegasescomefrom?Whatarethesolutiontothegreenhouseeffect?40整理課件PartTwoAirPollutionand

AcidRain

Howistheairpollutioncaused?Howdoesacidraindestroyourenvironment?Arethereanypracticalwaystopreventtheacidrain?Whatarethey?Howdoyouthinkoftheeffect?41整理課件PartThreeTheOzoneHoleHowdoestheozonelayerprotecthumanbeings?Whathasbeendestroyingtheozonelayer?Whereismoredangerousatcertaintimeofayear?42整理課件PartFourPollutionofRivers,

lakesandtheSea

Howaretheriverspolluteddirectly?Whatwillhappentotheseaanimalsandotherwildlife?Whyisthewarmwatermoredangerousthanthecoolwater?43整理課件1.Thesunisthemostimportantsourceofenergythattheearthhas.

(太陽是地球最重要的能量之源。)

注意在定語從句中，當(dāng)先行項(xiàng)帶有最高級(jí)修飾語時(shí)，其后的關(guān)系代詞通常用that。

e.g.Newtonwasoneofthegreatestmenthateverlived.

He'sthecleverestmanthatIhaveevermet.

此外，在以下情況中，定語從句的關(guān)系代詞一般也用that。

（1）當(dāng)先行項(xiàng)帶有only，all，any等限定詞時(shí)。

e.g.Youaretheonlypersonthatcanhelpme.

Anyboythatwantstosucceedmustworkhard.

AskMr.Green,oranyotherpersonthatislikelytoknow.

（2）當(dāng)先行項(xiàng)為all或其他指物的不定代詞如anything，something，nothing，且關(guān)系代詞在定語從句中做主語時(shí)。

e.g.Allthatglittersisnotgold.

Thismonumentisallthatremainsoftheancientcity.