Manycountriesareworriedaboutreducingenergyconsumptionandenvironmentalpollutionwhile increasing theproductivityandefficiency oftheirindustries.Thisstudyintendstocontributetothe literaturebyproposinganon-radialDEAmodelwiththeslacks-basedmeasure(SBM)toanalyzethe environmentalefficiency ofChina's transportationsector.Theresultsshowthatmostoftheprovincesin China donothaveaneco-efficient transportati…