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1、Unit1PartIGettingreadyA.B.Keys:1:burningofthefeststreeremoval(defestation)reductionofthewldsrainfests2:globalwarminggreenhouseeffectemissionsofCO2PartIITheEarthatrisk(I)A.Keys:1.a.Mepeoplemefirewoodfewertreesb.Medomestic
2、animalsmeplantsfeweravailableplantsabMedesertmovesouthdesrttexpingsouthnograss2.Growingcropsstabilizesoilwithoutthemthetopsoiljustblowsaway.Butifthereisntenoughrainthecropsdontgrow.3.Peopletrytogrowfoodtosupptthemselvest
3、ocreaterancheswherecattlecanberaisedtogethardwoodfexpttomakewayfanironemineB.Keys:1:SaharaDesert2:NthAmerica&mostofEurope3:topsoilblowingaway4:tropicalfestsdestruction5:animalplantspeciesbecomingextinct6:climatechangefth
4、ewholewldPartIIITheEarthatrisk(II)A.Keys:1:Treeswouldholdrainfallintheirroots.Whenfestsinthehigherupriverhavebeendestroyedalltherainthatfallsinthemonsoonseasonflowsstraightintotheriverstartstheflooding.2:Heimpliesthatsom
5、enationalgovernmentsjustconsidertheresultsoftheirpoliciesinthenearfuturejustthinkasfaraheadasthenextelection.B.Keys:onatRioSimonDaryrepts...PartIITheEarthatrisk(I)A.I(Interviewer):BrianCowlesistheproducerofanewseriesofdo
6、cumentariescalled“TheEarthatRisk“whichcanbeseenonChannel4laterthismonth.EachprogramdealswithadifferentcontinentdoesntitBrianB(BrianCowles):Thatsright.WewenttoAmericabothNthSouththenwewentovertoAfricaSouthEastAsia.I:whatd
7、idyoufindineachofthesecontinentsB:StartingwithAfricaourfilmshowstheimpactofthepopulationontheenvironment.GenerallyspeakingthishascausedtheSaharaDeserttoexp.Itsabitofaviciouscirclewefind.Peoplecutdowntreesffirewoodtheirdo
8、mesticanimalseatalltheavailableplants—soconsequentlytheyhavetomovesouthastheSaharaDesertexpsfurthersouth.ImeansoonthewholeofMaliwillbecomeadesert.inEastAfrica:herethegrasslsaresupptingtoomanyanimalstheresultisofcoursethe
9、resnograss—nothingftheanimalstoeat.I:Isee.thenextfilmdealswithNthAmericaB:Thatsright.IntheUSAasyouknowintensiveagriculturerequiresaplentifulsupplyofrainfthesecropstogrowImeanifthereisntenoughrainthecropsdontgrow.growingc
10、ropsstabilizesoilwithoutthemthetopsoiljustblowsaway.Thisisalsotruefanyregionthatisintenselyfarmed—mostofEuropefexample.I:whatdidyoufindinSouthAmericaB:InSouthAmerica(asinCentralAfricaSouthernAsia)tropicalfestsarebeingcut
11、downatanalarmingrate.ThisisdonesothatpeoplecansupptthemselvesbygrowingfoodtocreaterancheswherecattlecanberaisedtobeexptedtoEuropeAmericaastinnedmeat.Theproblemisthatthesoilissopothatonlyacoupleofharvestsarepossiblebefeth
12、isverythinsoilbecomesexhausted.itcantbefedwithfertilizerslikeagriculturallinEurope.FexampleinBrazilin1982anareaofjunglethesizeofBritainFrancecombinedwasdestroyedtomakewayfanironemine.Hugenumbersoftreesarebeingcutdownfexp
13、tsashardwoodtoJapanEuropeUSAtomakethingslikeluxuryfurniture.Thesefestscantbereplaced—thefestsoilisthinunproductiveinjustafewyearsajunglehasbecomeawastel.Tropicalfestscontainrareplants(whichwecanusefmedicinesfexample)anim
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