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StepbyStep3000(3)1Unit2.WorldNews:EarthandEnvironmentContents:WarmingupNewsreportCityrecyclingGoals:TotrainstudentstorecognizekeywordsandphrasesinlisteningTodevelopstudents’abilitytoidentifysignificantinformationthroughlisteningToactivatestudents’knowledgeaboutenvironmentTocultivatestudents’abilityofsummarizingTeachingmethods:Students’listening;groupdiscussion;teacher’sinstructionDuration:90minutesI.WarmingupA.blaze(n.&v)[C](a)brightflameorfire火焰;火光:Drywoodmakesagoodblaze.乾木燃起夺目的火焰.(b)verylarge(oftendangerous)fire大火;火灾:Fivepeoplediedintheblaze.有五人死於火灾.Brazil----RiodeJaneiro（formercapitalofBrazil）Thenewcity,Brasilia,replacedRiodeJaneiroasthecapitalofBrazilin1960.Desertificationistheprocessbywhichapieceoflandbecomesdry,empty,andunsuitableforgrowingtreesorcropson.(土壤)荒漠化,沙漠化-----AthirdofAfricaisunderthreatofdesertification.evergladen.marshland,swamp-------wetlandsregioninsouthernFlorida大沼泽地GreenlandStepbyStep3000(3)2n.self-governingislandbelongingtoDenmarklocatedbetweenIcelandandthenortheasterncoastalislandsofNorthAmerica(largestislandintheworld)Listentosomesentencesaboutenvironmentandsupplythemissinginformation.Checktheanswersafterstudents’discussion.1.Newresearchonthelikelyimpactofclimatechangesuggeststhatdamagetocropsinlow-lyingcoastalregionscouldbeworsethanpreviouslythought.2.Morethan2000delegatesfromaroundtheworldhavegatheredinnorthernBrazilforthethirdUnitedNationsConferenceonDesertification.3.CrewsareworkingtocleanupahugeoilspilloffthecoastofMexico,about50milessouthofSanDiego.-----aportcityinCalifornia(USA)4.WildfiresintheFloridaEvergladeshavebeencontainedafteranearlyaweekofblazesthatconsumed65,000hectaresinthesouthernpartoftheStates.5.A.USSpaceAgencystudyfindsthatGreenlandismeltingaroundtheedges.Thelosstotheworld’ssecondlargesticesheet---morethan50cubickilometersperyear---isenoughtoraiseglobalsealevelby0.13millimeters.B.Aerialoffensivereptile/ˈreptaɪl;US-tl;ˋrɛptl/nanyoftheclassofcold-blooded,egg-layinganimalsincludinglizards,tortoises,crocodiles,snakes,etcwithrelativelyshortlegsornolegsatall爬行动物（冷血,卵生,如蜥蜴﹑龟﹑鳄鱼﹑蛇等）;爬虫.‘salamander火蜥蜴alligator短吻鳄amphibian:两栖动物poppy:罂粟herbicide:substanceusedtodestroyweedsdirectory:listoftelephonesubscribers,businessfirms,etc.xericadj.ofadryenvironment,suitedforadryenvironmentxeriscaping-----alandscapingmethodthatemploysdrought-resistantplantsinanefforttoconserveresources,especiallywater.旱生园艺;节水型花园----通过选择需水少的植物，进行环境美化sawgrass----AtallcoastalormarshysedgeofeasternNorthAmerica,Mexico,andtheWestIndies,havingleaveswithsharp,minutelytoothedmargins.StepbyStep3000(3)3锯齿草:一种产于北美东部、西哥和西印度群岛高海岸或沼生的蓑衣草,叶片具有尖利的小齿边缘.锯草球场----golfcoursePreliminarylistening.Listentotheitemsandsummarizeeachofthem.Listentothenewsitemsagain.Focusyourattentiononthe“wh-“questionsandtrytoanswerthem.Discussionafterthefirstlistening.1.What?Itattemptstobalanceenvironmentalconcernsandtheneedsofthecommunity.2.What?Reptilespeciesareingreatertroublethanamphibianspecies.3．What?Anewapproachinthefightagainsttheillegaldrugstrade.4.What?Oneineveryeightspeciesofplantsisthreatenedwithextinction.5.What?Anewlocaldirectoryfortheenvironmentally-aware,calledthe“BoulderCountyGreenPages.”Newsitems:1.Australiaistheworld’sdriestcontinent.There’sgeneralagreementthatthecountryhastousewatermoreefficiently.Inmanyparts,suppliesareincrisis.AtameetinginCanberra,theCouncilofAustralianGovernmentshasapprovedanationalwaterplan.Itattemptstobalanceenvironmentalconcernsandtheneedsofthecommunity.Theamountofwatertakenfromriversforcommercialuseistobecutandfarmerswillbecompensated.2.Thedisappearanceanddeformityofamphibianssuchasfrogsandsalamandersfromrainforestsandmountainlakesworldwidehasattractedwide-spreadscientificattentionoverthelastdecade.Nowanewstudysaysreptilespeciesincludingturtles,snakes,andalligatorsareinevengreatertrouble.Twiceasmanyreptilesasamphibians,orsome100species,arecurrentlylistedasendangeredbytheWorldConservationUnion.Thestudysayshabitatlossanddegradation,pollution,disease,climatechange,andover-collectionforfood,petsanddrugsarethemajorthreatstoStepbyStep3000(3)4reptiles.3.Fourregionalgovernorsfromcolumbia,onavisittoWashington,havesharplycriticizedanAmerican-backedaerialoffensivetoeradicatethousandsofhectaresofillegalcocaandpoppyplantations.Atanewsconferencethegovernorscalledforadifferentapproachinthefightagainsttheillegaldrugstrade,sayingthattheherbicidescurrentlybeingusedwereharmfultopublichealthandtheenvironment.4.Muchattentionhasbeendevotedtothreatenedanimalspecies.Butwhataboutplantswhicharethefundamentalbasesoflife?Oneineveryeightspeciesofplantsisthreatenedwithextinction.Sinceallfoodchainsbegininthesphereofplantlife,thisisbadnewsfortheanimalstoo,includinghumanswhodependonplantsnotonlyforfoodbutalsoformedicines,buildingmaterials,andothervitalpurposes.5.Anewlocaldirectoryfortheenvironmentally-awareisnowavailable,calledthe“BoulderCountyGreenPages”.TheRotaryClubsinBoulderCountygottogetherwithlocalrecyclingandenvironmentalspecialiststoputtogetherthisfirst-everdirectory.Itincludesquickreferencetogreenproductsandservicesforrecycling,