国际英语2电子教案B2_U4.ppt

国际英语2电子教案B2_U4.ppt

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CoverCONTENTBook2Unit4-Environment-Text（A）-Text（B）Book2Unit4-EnvironmentContent-2TextstudyTextstudyBackgroundinformationWordsandexpressionsTextLookingatthetextLookingatthetextWorkingwithwordsWorkingwithwordsListeningListeningListening1Listening2Listening3PeopleandissuesText（A）Book2Unit4-EnvironmentContent-3TextstudyTextstudyBackgroundinformationWordsandexpressionsTextLookingatthetextLookingatthetextWorkingwithwordsWorkingwithwordsListening4Listening5ListeningListeningSpeakingSpeakingPersonalviewText（B）Book2Unit4-EnvironmentBriefsummaryoftheunitTopicsEnvironmentalpollutionTheeffectsofglobalwarmingEnvironmentallyfriendlymethodsoftransportRecycledgoodsReducingtheproductionofpersonalgarbageWaysofsavingenergyBeingenvironmentallyawareSkillsWritingasummaryInterpretingwarningsignsExplainingaprocessComparingtwotexts,lookingatkeypointsWriting:

WritingareportonsafetysignsProject:

AnalysingrubbishproducedbystudentsGrammarAdverbialclausesBook2Unit4-EnvironmentWarmingupCarbondioxideisoneofthesimplestandcommonestmoleculesintheuniverse.Ithasonlythreeatomsonecarbonandtwooxygenatoms.Webreatheoutcarbondioxide.Plantsbreatheincarbondioxideandgiveoffoxygen,whichiswhyweneedplantsandgreenbeltsaroundthecity.Whatkindsofpollutiondoyouknow?

Pleaselookoutofthewindowandanswerwhatpollutionthereisoutthereandgiveexamplesofhowitisproduced.DoyouknowwhatCO2is?

_Book2Unit4-Environment1.Whatkindsofpollutionareshowninthesepictures?

airpollutionFocuswaterandenvironmentalpollutionBook2Unit4-EnvironmentFocuswaterpollutionairpollutionBook2Unit4-EnvironmentFocusnoisepollutionwaterandenvironmentalpollutionnoisepollutionBook2Unit4-EnvironmentFocus2.Workwithapartnerandfindmoreexamplesofthesekindsofpollution.Anotherexampleofenvironmentalpollutioniswhenwethrowourrubbishinthestreetoroutofcars.Eventhrowingrubbisharoundintheschoolisenvironmentalpollution.AnotherexampleofnoisepollutioniswhenoneplayshismusictooloudlyorhastheTVonfullvolume.Waterpollutioniswhenanoiltankerbreaksupandlosesitscargo.Airpollutioniswhenalotofpeoplesmokeinoneroom,orwhenonlyonepersonistravellinginacarinsteadoffourpeople.Book2Unit4-EnvironmentFocus3.Whatcanwedotostopthis?

Wecanstopthisbynotusingthecarforshortjourneysandwalkingortakingpublictransport.Wecouldputahighertaxonfuelsothatpeoplewouldnottravelaloneintheircarbutsharethecost.Book2Unit4-EnvironmentFocus4.Whatcanyoupersonallydo?

Icanstopsmoking.Icanstopthrowingrubbishinthestreets.Icantrytorecyclemyrubbishbyputtingitinthepropercontainers.IcanturndownthevolumeoftheTVormymusicsystem.Book2Unit4-EnvironmentTheUnitedNationsEnvironmentProgramme（UNEP）isaninternationalinstitution（aprogramme,ratherthananagencyoftheUN）thatcoordinatesUnitedNationsenvironmentalactivities,assistingdevelopingcountriesinimplementingenvironmentallysoundpoliciesandpractices.Itsactivitiescoverawiderangeofissuesregardingtheatmosphere,marineandterrestrialecosystems,environmentalgovernanceandgreeneconomy.Ithasplayedasignificantroleindevelopinginternationalenvironmentalconventions,promotingenvironmentalscienceandinformationandillustratingthewaythatcanbeimplementedinconjunctionwithpolicy,workingonthedevelopmentandimplementationofpolicywithnationalgovernments,regionalinstitutionsinconjunctionwithenvironmentalnon-governmentalorganizations（NGOs）.UNEPhasalsobeenactiveinfundingandimplementingenvironment-relateddevelopmentprojects.BackgroundinformationWordsandexpressionsTextTextstudy（A）UnitedNationsEnvironmentProgrammeTextA-background-1-1Book2Unit4-EnvironmentBackgroundinformationWordsandexpressionsTextCycloneInmeteorology,acycloneisanareaofclosed,circularfluidmotionrotatinginthesamedirectionastheEarth.Thisisusuallycharacterizedbyinwardspiralingwindsthatrotateanti-clockwiseintheNorthernHemisphereandclockwiseintheSouthernHemisphereoftheEarth.Mostlarge-scalecycloniccirculationsarecenteredonareasoflowatmosphericpressure.Thelargestlow-pressuresystemsarecold-corepolarcyclonesandextratropicalcycloneswhichlieonthesynopticscale.Cyclonescanproducecloudyweatherandbroadareasofrainandevensnow.TextA-background-2Textstudy（A）Book2Unit4-Environmentdesperatelyadv.veryorverymuch极度地，极强烈地environmentn.surroundings环境committeen.agroupofpeoplechosentodoaparticularjob,makedecisions,etc.委员会criticaladj.seriousorworrying危急的，严重的industrialadj.relatingtoindustry工业的climaten.weather气候BackgroundinformationWordsandexpressionsTextTextA-wordsandexpressions-1Textstudy（A）Boo