6Roberta Q,Sierra P. The Energy - climate Challenge: Recent Trends in C02Emissions from Fuel Com - bustion [ J ] . Energy Policy, 2007 , (35) : 5938 -5952.
7OECD.Indicatorsto Measure Decoupling of Environmental Pressure from Co-nomic Growth[ H] . Paris : OECD,2002.
8TapioP. Towards a Theory of Decoupling: Degrees of Decoupling in the EUand the Case of Road Traffic in Finland Between 1970 and 2001 [ J] . Trans-port Policy,2005,12(2):137- 151.
9Roca J. The IP AT Formula and Its Limitations [ J ] . Ecological Economics,2002,42 (1 -2):1 -2.