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1、2012年6月全国大学英语六级考试试卷PartⅣReadingComprehension(ReadinginDepth)(25minutes) SectionA Directions:Inthissection,thereisashortpassagewith5questionsorincompletestatements.Readthepassagecarefully.Thenanswerthequestionsorcompletethestatementsinthefewestpossiblewords.Pleasewrite
2、youranswersonAnswerSheet2 Questions47to51arebasedonthefollowingpassage. Infaceofglobalwarming,muchefforthasbeenfocusedonreducinggreenhousegasemissionsthroughavarietyofstrategies.Butwhilemuchoftheresearchandinnovationhasconcentratedonfindingless-pollutingenergyalternat
3、ives,itmaybedecadesbeforecleantechnologieslikewindandsolarmeetasignificantportionofourenergyneeds. Inthemeantime,theamountofCO2intheairisrapidlyapproachingthelimitsproposedbytheIntergovernmentalPanelonClimateChange(IPCC).“Aslongaswe’reconsumingfossilfuels,we’reputtingo
4、utCO2,”saysKlausLackner,ageophysicistatColumbia,University”WecannotlettheCO2intheatmosphereriseindefinitely.” ThatsenseofurgencyhasincreasedinterestincapturingandstoringCO2,whichtheIPCCsayscouldprovidethemorethan50%reductioninemissionsthoughtneededtoreduceglobalwarming
5、.“Weseethepotentialforcaptureandstoragetoplayanintegralroleinreducingemissions,”saysKimCorley,Shell’ssenioradvisorofCO2andenvironmentalaffairs.Thatforwardthinkingstrategyisgainingsupport.TheU.S.DepartmentofEnergyrecentlyproposedputting$1billionintoanew$2.4billioncoal-bu
6、rningenergyplant.Theplant’scarbon-capturetechnologieswouldserveasapilotprojectforothernewcoal-burningplants. Butwhatdoyoudowiththegasonceyou’vecapturedit?Oneoptionistoputittonewuses.DakotaGasificationofNorthDakotacapturesCO2ataplantthatconvertscoalintosyntheticnaturalg
7、as.Itthenshipsthegas200milesbypipelinetoCanada,whereitispumpedundergroundinoilrecoveryoperations.IntheNetherlands,ShelldeliversCO2tofarmerswhopipeitintotheirgreenhouses,increasingtheiryieldoffruitsandvegetables. However,scientistssaythatthescaleofCO2emissionswillrequir
8、evastamountsoflong-termstorage.SomeproposestoringtheCO2incoalminesorliquidstorageintheocean,Shellfavorsstoring
