7IPCC. Summary for Policymakers of climate change 2007: mitigation con- tribution of working group III to the fourth assessment report of the inter- governmental panel on climate change. London: Cambridge University Press, 2007.
8DTI(Department of Trade and Industry). U K Energy White Paper: Our Energy Future-creating a Low Carbon Economy[ R ]. London, TSO (The Stationery Office) , 2003.
9United Nations. Kyoto Protocol to the United Nations Framework Convention on Climate Change [ EB/OL ]. Http ://unfccc. int/resource/docs/convkp/kpeng, html. 2009-08-30.
10World Tourist Organization ( WTO ). What Tourism Managers Need to Know: A Practical Guide to the Development and Use of Indicators of Sustainable Tourism [ R ]. Madrid : 1996. 20 - 45.