8UNWTO.Towards a low carbon travel & tourism sector.Report in World Economic Forum,2009:3-36.
9G(o)ssling S.Global environmental consequences of tourism.Global Environmental Change,2002,12(4):283-302.
10Kuo N,Chen P.Quantifying energy use,carbon dioxide emission,and other environmental loads from island tourism based on a life cycle assessment approach.Journal of cleaner production,2009,(17):1324-1330.