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《英语高级视听 听力原文 Unit 5 The global warning》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Unit5TheglobalwarningTheNorthPolehasbeenfrozenfor100,000years.Butaccordingtoscientists,thatwon'tbetruebytheendofthiscentury.Thetopoftheworldismelting.There'sbeenadebateburningforyearsaboutthecausesofglobalwarming.Butthescientistsyou'reabouttomeetsaythedebateisover.Newe
2、videnceshowsmaniscontributingtothewarmingoftheplanet,pumpingoutgreenhousegasesthattrapsolarheat.MuchofthisnewevidencewascompiledbyAmericanscientistBobCorell,wholedastudycalledthe"ArcticClimateImpactAssessment."It'sanawkwardname—butconsiderthefindings:theseasarerising,h
3、urricaneswillbemorepowerful,likeKatrina,andpolarbearsmaybeheadedtowardextinction.Whatdoesthemeltingarcticlooklike?CorrespondentScottPelleywentnorthtoseewhatBobCorellcallsa"globalwarning."Towersoficetheheightof10-storybuildingsriseonthecoastofGreenland.It'sthebiggestice
4、sheetintheNorthernHemisphere,measuringsome700,000squaremiles.Buttemperaturesinthearcticarerisingtwiceasfastastherestoftheworld,soalotofGreenland'siceisrunningtothesea."Rightnowtheentireplanetisoutofbalance,"saysBobCorell,whoisamongtheworld'stopauthoritiesonclimatechang
5、e.Heled300scientistsfromeightnationsinthe"ArcticClimateImpactAssessment."Corellbelieveshehasseenthefuture."Thisisabellwether,abarometer.Somepeoplecallitthecanaryinthemine.Thewarningthatthingsarecoming,"hesays."In10yearshereinthearctic,weseewhattherestoftheplanetwillsee
6、in25or35yearsfromnow."Overthelastfewdecades,theNorthPolehasbeendramaticallyreducedinsizeandCorellsaystheglacierstherehavebeenrecedingforthelast50years.Backin1987,PresidentReaganaskedCorelltolookintoclimatechange.He'sbeenatiteversince.InIceland,heshowed60Minutesglaciers
7、thatweregrowinguntilthe1990sandarenowmelting.Infact,98percentoftheworld'smountainglaciersaremelting.Corellsaysallthatwaterwillpushsealevelsthreefeethigherallaroundtheworldin100years."YouandIsithere,anotherfoot.Yourchildren,anotherfoot.Yourgrandchildren,anotherfoot.Andi
8、twon'ttakelongforsealeveltoinundate,"saysCorell."Sealevelwillbeinundatingthelowlandsofvirtuallyeverycountryoftheworld
