1Department of Trade and Industry (DTI). UK Energy White Paper: our energy future-creating a low carbon economy [M]. London: TSO, 2003.
2Greater London Authority. Action today to protect tomorrow: the mayor's climate change action plan [EB/OL]. (2008-05-28). http:// www.london.gov.uk/mayor/environment/climate-change/docs/ccap- fullreport.pdf.
3Zheng S, Wang R, Edward L, et al. The greenness of China: Household carbon dioxide emissions and urban development [EB/ OL]. (2010-03-19). http://www.nber.orgfpapers/w 1562 I.