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【导读】本文是一篇说明文。研究者在喜马拉雅山采集的冰芯样本中发现了工业革命时期留下的污染物。
NewresearchsuggeststhatpollutionfromtheIndustrialRevolutiontraveledover6,000milesfromLondontoaHimalayanmountain.
Researchersstudiedanicecore(冰芯)thatwasfromthehighestpeakeverdrilled.ThesiteonMountShishapangmasitsat23,600feetabovesealevel.Theirgoalwastofindiftherewaseffectofhumanactivities.Whenanalyzinganddatingtheice,theyfoundunnaturallyhighlevelsofmetals,whichstartedinthe1780sduringtheIndustrialRevolution.ThepollutantsarelikelyashfromLondonfactories,orfromforestfiressettoclearlandforagrowingpopulation.
Theobviousquestionishowtheashfounditswayintothisglacier(冰川).PaoloGabrielli,thestudy’sleadauthor,thinkstheashenteredtheupperatmosphere.Fromthere,windsthattravelaroundtheglobefromWesttoEastblewitallthewaytotheHimalayas.
Icecoreslikethisare“frozenarchives(档案)ofthepast”andcontainahistoryofthetemperatureoftheplanet.“Wecountannuallayersbetween1500CEand1992.Atthebeginningofourrecord,wedidn’tobserveanykindofhumancontributioninourice.Andthislasteduntilabouttheyear1780,”Gabrielliexplained.“Theicesamplestellstoriesthathaveeffectcoveringthewholeworld,becauseregionswherewetookthesesamplesaresofarfromlocalpollutant-producingareaslikevillages,industriesandforests.”
Thisfindingisnotthefirsttimeicecoreshaverevealedsignsofhumanactivitiesfromthepast.ApreviousstudyshowedthataglacierintheAndesMountainsofSouthAmericaborethingslikeleadandarsenic,depositedinthe16thcentury.Also,oneicecorefromtheAlpsrevealedEuropeansmass-producingsilverbetween640CEand660,releasingleadasasideeffect.
“Wehaveharmedeventhemostremoteareasoftheworld.Andso,atthistime,there’smostlikelynoglacieronearththatdoesn’tshowourpresence,”saidGabrielli.
32.Whydidresearchersbegintoanalyzetheicecore?
A.Tofindwhaticecoreshadgonethrough.
B.TodatewhentheHimalayaswaspolluted.
C.Toseewhetherhumanshadaffectedtheice.
D.Toexplorehowtheashgotintotheglacier.
33.WhatdothepollutedicecoresshowaccordingtoGabrielli?
A.Pollutionhasaglobalinfluence.
B.Glaciershavebeenpollutedsince1500.
C.Temperatureishigheryearbyyear.
D.Pollutantswerefromfactoriesandfires.
34.Howdoestheauthorprovehispointinparagraph5?
35.Whichcanbethebesttitleforthetext?
A.IceCores:FrozenArchivesofGlaciers’Past
B.HumansHavingInfluenceonAllGlaciersonEarth
C.IndustrialRevolutionPollutionFoundinHimalayanIce
D.AncientAsh:WitnesstotheIndustrialRevolution
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