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