大学英语听力3第一单元 文本打印范本Word格式文档下载.docx
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大学英语听力3第一单元 文本打印范本Word格式文档下载.docx
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EnvironmentalissuesswelltothefullinBerlinthisweek,fortheUNspongsoredconferenceonglobalwarmingandclimatechangeisthefirstsuchmeetingsincetheRiosummitthreeyearsago.WithscientistsandgovernmentsnowgenerallyreadytoacceptthattheearthclimateisbeingaffectedbyemissionsofCO2andothergreenhousegases,overahundredcountriesaresendingdelegations.ButhowmuchprogresshasbeenmadeimplementingthegreenhousegasreductiontargetagreedonatRio?
SimonDaryreports...
Part2
A
I-Interviewer
B-BrianCowles
I:
BrianCowlesistheproducerofanewseriesofdocumentariescalled"
TheEarthatRisk"
whichcanbeseenonChannel4laterthismonth.Eachprogramdealswithadifferentcontinent,doesn'
tit,Brian?
B:
That'
sright.WewenttoAmerica,bothNorthandSouthandthenwewentovertoAfricaandSouth-EastAsia.
Andwhatdidyoufindineachofthesecontinents?
StartingwithAfrica,ourfilmshowstheimpactofthepopulationontheenvironment.Generallyspeaking,thishascausedtheSaharaDeserttoexpand.It'
sabitofaviciouscirclewefind.Peoplecutdowntreesforfirewoodandtheirdomesticanimalseatalltheavailableplants—andsoconsequentlytheyhavetomovesouthastheSaharaDesertexpandsfurthersouth.Imean,soonthewholeofMaliwillbecomeadesert.AndinEastAfrica:
herethegrasslandsaresupportingtoomanyanimalsandtheresultis,ofcourse,there'
snograss—nothingfortheanimalstoeat.
Isee.AndthenextfilmdealswithNorthAmerica?
sright.IntheUSA,asyouknow,intensiveagriculturerequiresaplentifulsupplyofrainforthesecropstogrow,Imeanifthereisn'
tenoughrainthecropsdon'
tgrow.Andgrowingcropsstabilizesoil,withoutthemthetopsoiljustblowsaway.Thisisalsotrueforanyregionthatisintenselyfarmed—mostofEurope,forexample.
AndwhatdidyoufindinSouthAmerica?
InSouthAmerica(asinCentralAfricaandSouthernAsia)tropicalforestsarebeingcutdownatanalarmingrate.ThisisdonesothatpeoplecansupportthemselvesbygrowingfoodortocreaterancheswherecattlecanberaisedtobeexportedtoEuropeorAmericaastinnedmeat.Theproblemisthatthesoilissopoorthatonlyacoupleofharvestsarepossiblebeforethisverythinsoilbecomesexhausted.Anditcan'
tbefedwithfertilizerslikeagriculturallandinEurope.
Forexample,inBrazilin1982anareaofjunglethesizeofBritainandFrancecombinedwasdestroyedtomakewayforanironoremine.HugenumbersoftreesarebeingcutdownforexportsashardwoodtoJapan,Europe,USAtomakethingslikeluxuryfurniture.Theseforestscan'
tbereplaced—theforestsoilisthinandunproductiveandinjustafewyears,ajunglehasbecomeawasteland.Tropicalforestscontainrareplants(whichwecanuseformedicines,forexample)andanimals—oneanimalorplantspeciesbecomesextincteveryhalfhour.Theseforesttreesalsohaveworldwideeffects.Youknow,theyconvertcarbondioxideintooxygen.Theconsequenceofdestroyingforestsisnotonlythattheclimateofthatregionchanges(becausethereislessrainfall)butthischangeaffectsthewholeworld.Imean,overhalftheworld'
srainforesthasbeencutdownthiscentury.
B
sright,yes,wewentto...er...wewenttoAmerica,bothNorthandSouthandthenwewentovertoAfricaandSouth-EastAsia.
Well...er...startingwith...er...Africa,ourfilmshowstheimpactofthepopulationontheenvironment.Generallyspeaking,thishascausedtheSaharaDeserttoexpand.It'
sabitofaviciouscircle...er...wefind,peoplecutdowntreesforfirewoodandtheirdomesticanimalseatalltheavailableplants—andsoconsequentlytheyhavetomovesouthastheSaharaDesertexpandsfurthersouth.Imean,soonthewholeofMaliwillbecomeadesert.And...er...inEastAfrica:
Mm,yes,Isee.Um...andthe...thenextfilmdealswithNorthAmerica?
sright.Inthe...er...USA,asyouknow,intensiveagriculturerequiresaplentifulsupplyofrainforthesecropstogrow,Imeanifthereisn'
tgrow.Andgrowingcropsstabilizesoil,withoutthemthetopsoiljust...itjustblowsaway.Imean,thisisalsotrueforanyregionthatisintenselyfarmed—mostofEurope,forexample.
InSouthAmerica(a...asinCentralAfricaandSouthernAsia)tropicalforestsarebeingcutdownatanalarmingrate.Th...thisisdonesothatpeoplecansupportthemselvesbygrowingfoodortocreaterancheswherecattlecanberaisedtoexp...tobeexportedtoEuropeorAmericaastinnedmeat.Theproblemisthatthes...thesoilissopoorthat...um...thatonlyacoupleofharvestsarepossiblebeforethisverythinsoilbecomesexhausted.Anditcan'
Um...forexample,inBrazilin1982anareaofjunglethesizeofBritainandFrancecombinedwasdestroyedtomakewayforanironoremine.Imean,hugenumbersoftreesarebeingcutdownforexportashardwoodtoJapan,Europe,USA...Imean...tomakethingslikeluxuryfurniture.Theseforestscan'
t...er...theycan'
tbereplaced—theforestsoilisthinandunproductiveandinjustafewyears,a...ajunglehasbecomeawasteland.Tropicalforestscontainrareplants(which...er...wecanuseformedicines,forexample)andanimals—oneanimalorplantspeciesbecomesextincteveryhalfhour.These...er...foresttrees...Imean...alsohaveworldwideeffects.Youknow,theyconvertcarbondioxideintooxygen.Theconsequenceofdestroyingforestsisnotonlythattheclimateofthatregionchanges(becausethereislessrainfall)butthischangeaffectsthewholeworld.Imean,overhalftheworld'
srainforesthasbeencutdownthiscentury.
Part3
So,Brian,wouldyouagreethatwhatwegenerallythinkofasnaturaldisastersareinfactman-made?
Yes,byandlarge.Imean,obviouslynothurricanesorearthquakes,buttakeflooding,forexample.Practicallyeveryyear,thewholeofBangladeshisfloodedandthisisgettingworse.Youknow,thecauseisthatforestshavebeencutdownupinNepalandIndia,Imeanhigherup-riverintheHimalayas.Treeswouldholdrainfallintheirroots,butifthey'
vebeencutdownalltherainthatfallsinthemonsoonseasonflowssraightintotheriverGangesandfloodsthewholecountry.ThereasonforfloodinginSudanisthesame—theforestshigheruptheBlueNileinEthiopiahavebeendestroyedtoo.
Well,thisallsoundsterriblydepressing.Um...Whatistobedone?
Imean,cananythingbedone,infact?
Yes,ofcourseitcan.First,thenationalgovernmentshavetobeforward-lookingandconsidertheresultsoftheirpoliciesintenortwentyyears,notjustthinkasfaraheadasthenextelection.Somehow,allthecountriesintheworldhavetoworktogetheronaninternationalbasis.Secondly,thepopulationhastobecontrolledinsomeway:
therearetoomanypeopletryingtoliveofftoolittleland.Thirdly,wedon'
tneedtropicalhardwoodtomakeourfurniture—it'
saluxurypeopleintheWestmustdowithout.Softwoodsarejustasgood,lessexpensiveandcanbeproducedonenvironment-friendly"
treefarms"
wheretreesarereplacedatthesameratethattheyarecutdown.
And,presumably,educationisimportantaswell.Peoplemustbeeducatedtorealizetheconsequencesoftheiractions?
Yes,ofcourse.
Well,thankyou,Brian.
So,Brian,wouldyouagreethatwhatwegenerallythinkofas...er...aser...naturaldisastersareinfactman-made?
Yes,byandlarge...er...Imean,obviouslynothurricanesorearthquakes,buttakeflooding,forexample.Imean,practicallyeveryyear,thewholeofBangladeshisfloodedandthisisgettingworse.Youknow,thecauseisthatforestshavebeencutdownupinNepalandIndia...Imean...higherup-riverintheHimalayas.Trees...er...wouldholdrainfallintheirroots,butifthey'
vebeencutdownalltherainthatfallsinthemonsoonseasonflowsstraightintotheriverGangesandfloodsthewholecountry.ThereasonforfloodinginSudanisthesame—theforestshigheruptheBlueNileinEthiopiahavebeendestroyedtoo.
Well,thisallsoundsterriblydepressing.Um...whatistobedone?
Yes,ofcourseitcan...er...first,thena
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