we already know the fastest, least expensive way to slow climate change- 阅读答案

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1、Wealreadyknowthefastest,leastexpensivewaytoslowclimatechange:阅读答案　　Wealreadyknowthefastest,leastexpensivewaytoslowclimatechange:Uselessenergy.Withalittleeffort,andnotmuchmoney,mostofuscouldreduceourenergydietsby25percentormore—doingtheEarthafavorwhilealsohelpingourwallets.　　Notlongage.

2、Mywife,PJ,andItriedanewdiet—nottolosealittleweightbuttoansweranannoyingquestionaboutclimatechange.Scientistshavereportedrecentlythattheworldisbendingupevenfasterthanpredictedonlyafewyearsago,andthattheconsequencescouldbesevereifwedon’tkeepreducingemissions（排放）ofcarbondioxide（CO2）andoth

3、ergreenhousegasesthataretrappingheatinouratmosphere.　　Wedecidedtotryanexperiment.ForonemonthwerecordedourpersonalemissionsofCO2..Wewantedtoseehowmuchwecouldcutback,sowewentonastrictdiet.TheaverageUShousehold（家庭）producesabout150poundsofCO2adaybydoingcommon-placethingsliketurningonair-co

4、nditioningordrivingcars.That’smorethantwicetheEuropeanaverageandalmostfivetimestheglobalaverage,mostlybecauseAmericansdrivemoreandhavebiggerhouses.Buthowmuchshouldwetrytoreduce?　　Forananswer,IcheckedwithTimFlannery,authorofTheWeatherMakers:HowManIsChangingtheClimateandWhatItMeansforLif

5、eonEarth.Inhisbook,hehadchallengedreaderstomakedeepcutsinpersonalemissionstokeeptheworldfromreachingextremelyimportanttippingpoints,suchasthemelting（融化）oftheicesheetsinGreenlandorWestAntarctica.“Tostaybelowthatpoint,weneedtoreduceCO2emissionsby80percent,”hesaid.　　Goodadvice,Ithought.I’

6、dopenedourbedroomwindowstoletinthewind.We’dgottensousedtokeepingourair-conditioninggoingaroundtheclock.I’dalmostforgottenthewindowsevenopened.Weshouldnotletthishappenagain.It’stimeforustochangeourhabitsifnecessary.　　72.Whydidtheauthorandhiswifetryanewdiet?　　A.TotakespecialkindsoffoodB.

7、Torespondtoclimatechange.　　C.ToloseweightD.Toimprovetheirhealth　　73.Theunderlinedwords“tippingpoints”mostprobablyreferto　　A.freezingpointsB.burningpointsC.meltingpointsD.boilingpoints　　74.Itcanbeinferredfromthepassagethat　　A.itisnecessarytokeeptheair-conditioningonallthetime　　B.itsee