大學(xué)英語(yǔ)聽(tīng)力教程第三冊(cè)聽(tīng)力原文(第二版-張民倫主編)

1、1大學(xué)英大學(xué)英語(yǔ)聽(tīng)力教程第三冊(cè)（第二版）聽(tīng)力教程第三冊(cè)（第二版）聽(tīng)力原文聽(tīng)力原文UNIT1IstheEarthBeingSqueezedDryPart1GettingreadySectionB1.TheAmazonfestsaredisappearingbecauseofincreasedburningtreeremoval.InSeptembersatellitepicturesshowedmethan20000firesburnin

2、gintheAmazon.Expertssaymostofthesefiresweresetbyfarmers.Thefarmerswereattemptingtoclearltogrowcrops.TheWldWildlifeFundsaysanotherseriousproblemisthattoomanytreesintheAmazonrainfestarebeingcutdown.TheWldWildlifeFundsaysth

3、efiresshowtheneedfurgentinternationalactiontoprotectthewldsrainfests.Thegroupwarnsthatwithoutsuchactionsomefestscouldbelostfever.2.EnvironmentalissuesswelltothefullinBerlinthisweekftheUNsponsedconferenceonglobalwarmingcl

4、imatechangeisthefirstsuchmeetingsincetheRiosummitthreeyearsago.WithscientistsgovernmentsnowgenerallyreadytoacceptthattheearthclimateisbeingaffectedbyemissionsofCO2othergreenhousegasesoverahundredcountriesaresendingdelega

5、tions.ButhowmuchprogresshasbeenmadeimplementingthegreenhousegasreductiontargetagreedonatRioSimonDaryrepts.Part2TheEarthatrisk(1)I:BrianCowlesistheproducerofanewseriesofdocumentariescalled“TheEarthatRisk“whichcanbeseenonC

6、hannel4laterthismonth.EachprogramdealswithadifferentcontinentdoesntitBrianB:Thatsright.WewenttoAmericabothNthSouththenwewentovertoAfricaSouthEastAsia.I:whatdidyoufindineachofthesecontinentsB:StartingwithAfricaourfilmshow

7、stheimpactofthepopulationontheenvironment.GenerallyspeakingthishascausedtheSaharaDeserttoexp.Itsabitofaviciouscirclewefind.Peoplecutdowntreesffirewoodtheirdomesticanimalseatalltheavailableplants—soconsequentlytheyhavetom

8、ovesouthastheSaharaDesertexpsfurthersouth.ImeansoonthewholeofMaliwillbecomeadesert.inEastAfrica:herethegrasslsaresupptingtoomanyanimalstheresultisofcoursetheresnograss—nothingftheanimalstoeat.I:Isee.thenextfilmdealswithN

9、thAmericaB:Thatsright.IntheUSAasyouknowintensiveagriculturerequiresaplentifulsupplyofrainfthesecropstogrowImeanifthereisntenoughrainthecropsdontgrow.growingcropsstabilizesoilwithoutthemthetopsoiljustblowsaway.Thisisalsot

10、ruefanyregionthatisintenselyfarmed—mostofEuropefexample.I:whatdidyoufindinSouthAmericaB:InSouthAmerica(asinCentralAfricaSouthernAsia)tropicalfestsarebeingcutdownatanalarmingrate.Thisisdonesothatpeoplecansupptthemselvesby

11、growingfoodtocreaterancheswherecattlecanberaisedtobeexptedtoEuropeAmericaastinnedmeat.Theproblemisthatthesoilissopothatonlyacoupleofharvestsarepossiblebefethisverythinsoilbecomesexhausted.itcantbefedwithfertilizerslikeag

12、riculturallinEurope.FexampleinBrazilin1982anareaofjunglethesizeofBritainFrancecombinedwasdestroyedtomakewayfanironemine.HugenumbersoftreesarebeingcutdownfexptsashardwoodtoJapanEuropeUSAtomakethingslikeluxuryfurniture.The

13、sefestscantbereplaced—thefestsoilisthinunproductiveinjustafewyearsajunglehasbecomeawastel.Tropicalfestscontainrareplants(whichwecanusefmedicinesfexample)animals—oneanimalplantspeciesbecomesextincteveryhalfhour.Thesefestt

14、reesalsohavewldwideeffects.Youknowtheyconvertcarbondioxideintooxygen.Theconsequenceofdestroyingfestsisnotonlythattheclimateofthatregionchanges(becausethereislessrainfall)butthischangeaffectsthewholewld.Imeanoverhalfthewl

15、dsrainfesthasbeencutdownthiscentury.Part3TheEarthatrisk(2)SectionA3itextremelysimplyplantstherearequiteneartheirlimitsofheatdroughtstress.Anincreaseintemperaturereductioninmoisturewouldplacelimitsoncropgrowth.“Woman:Glob

16、alwarmingcouldreducefoodproductioninlowerlatituderegions.Lowerlatituderegionsarealreadywarm.Globalwarmingcouldputmestressonplansplacelimitsoncropgrowth.Foodproductionisonlyoneareathatcouldbeaffected.Therecouldalsobehealt

17、hsocialproblems.Prof.AntonyMacMichaeloftheLondonSchoolofHygieneTropicalMedicinebelievesthatsomeruralareasarealreadysuffering.theinsectsbacteriacouldspreaddiseasemeeasily.“Alreadyanumberofruralpopulationsaroundthewldaresu

18、fferingfromthedeclineofagriculturalsystems.Climatechangewouldaddtothis.wewouldexpectthatitwouldacceleratethefloodofenvironmentalrefugeesaroundthewld.Butitincludesnotjustthefoodproductionsystemsbutthepatternsofdistributio

19、nofinsectsinfectiveagentsaroundthewld.Itincludeslikelyeffectsonpatternsofhearrelatedfoodpoisoningwatercontaminationdiarrheadiseaseslotsofthingslikethisthatwouldrespondsensitivelytochangesinclimate.“Woman:Globalwarmingcou

20、ldaffectthedistributionofinsects.Globalwarmingcouldchangepatternsofheatrelatedfoodpoisoning.Manycountriesnowagreethatsomethingmustbedonetoreducethedangerofglobalwarming.Butawldwideagreementonloweringtheproductionofcarbon

21、dioxidehasbeendifficulttoreach.Thisisbecausemanyeconomiesdependonfossilfuelslikeoil.Scientistsbelieveitsnowthepoliticiansineveryregionofthewldwhoneedtotakeaction.Part5Doyouknow…Environmenthastakenratherabackseatpolitical

22、lysincetheEarthsummitinRiodeJaneironearly5yearsago.Buttheproblemsthatmeetinghighlightedhadnotgoneaway.Oneenvironmentalthinktank—theInternationalFoodPolicyResearchInstitute—hasbeenlookingatthefutureofwateritsreptreflectsg

23、rowingconcernatthehugeleapinusageoverthepastfewyears.Insomepartsofthewldwaterconsumptionhasincreasedfivefold.theinstituteknownbyitsinitialsIFPRIsaysshtagescouldsoonbecomethetriggerfconflictamajbarriertofeedingthewldsgrow

24、ingpopulation.HeresRidBlackofourScienceUnit.“Itsoftenbeensaidthatwaterratherthanoilwillbethecauseofwarfareinthenextcentury.AccdingtotheIFPRIreptthetimewhenthathappensmightnotbefaraway.Thenumberofpeopleaffectedbywatershta

25、gewillincreasetenfoldoverthenext30yearsitsayswhichcouldwellleadtolargescaleconflicts.Themainreasonwhywaterisbecomingascarceresourceisagriculturewhichnowaccountsf70%ofwaterconsumptionwldwide90%insomedevelopingcountries.Co

26、untlessfarmershaveswitchedfromgrowingindigenouscropsfthehomemarkettohighyieldexptvarietieswhichinevitablyneedfarmewater.ButtheIFPRIreptsaysthatinsomeregionswatershtageisnowthesinglebiggestimpedimenttofeedingthepopulation

27、.Waterscarcityalsoleadstowaterpollution.IntheIndianStateofWestBengalfexampleoverextractionofwaterfrombeholeshasledtoarsenicpoisoningwhichisestimatedtohaveaffectedtwomillionpeoplesofar.ButtheIFPRIreptcallsfbetterwatermana

28、gementwldwideincludingfinancialincentivestoencourageconservation.“Unit2Part1GettingreadyA:HelloImcallingonbehalfoftheWldWildlifeFund.B:ThewhatA:TheWldWildlifeFund.IfyouvegotafewminutesIdliketotellyouwhatthatmeans.B:Ohall

29、right.A:Wewktoconservenaturalareasthatcontainendangeredwildlife.Theseasfexamplehavebecomepollutedbytheindustrializedwldwhalesarebeinghuntedtoextinctionturtlesarerolledofftheireggswhentheycomeashetobreedareslaughteredfthe