2Woerdman,E.Implementing the Kyoto Protocol: Why JI and CDM show more Promise than International Emissions Trading[J]. Energy Policy, Vo1:28(1), 2000, P:29-38.
3U.S.Enviromental Protection Agency.Acid Rain Program Progress Report,http://www.epa.gov/airmarkets/pmgress/arpreport/index.html,2004.