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Thevalueofafuel'slong-termusefulnessandviabilityisjudgedthroughitsenergyreturnoninvestment;(EROI)studypublishedintheJournalofIndustrialEcologyfindsthat shale(页岩) ,gasisminedfromhorizontal,. TheanalysisindicatesthattheEROIratioofatypicalwellislikelybetween64:1and112:1,withameanofapproximately85:(EUR),whichfallsbetween50:1and85:1. "Ouranalysisindicatesthatgascanbeextractedfromshaleefficiently,(energy)investmentratio(EROI)doesseemtobeatleastasfavorableascoal,"saidleadauthorMikeAucott."However,." "Thereareconcernsaboutwaterpollutionandotherenvironmentalimpactsassociatedwithshalegasproduction,"concludedAucott."Withtheassumptionthatthesecanbemanaged,andthatproductionquantitiesremainconsistentwithinitialproductiondata,thefavorableEROIsuggeststhatshal

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