3Environmental Protection Agency. California Waivers and Authorizations[Z/OL]. 2011. http://www.epa.gov/otaq/cafr.htm#waiver. [2011-05-19],.
4Air Resources Board. Assembly Bill 32: Global Wanning Solutions Act [Z/ OL]. http://www.arb.ca.gov/cc/ab32/ab32.htm. [2011-05-19].
5Ministry of Small Business and Revenue. British Columbia Carbon Tax [Z/ OL].2008. http://www.rev.gov.bc.ca/documents_library/notices/British Columbia Carbon Tax.Ddf. 1-2011-05-19].
2New York City, Department of City Plan- ning. Zone green text amendment [EB/ OL]. [2012-04-30]. http://www.nyc. gov/html/dcp/html/greenbuildings/index. shtml.
3MARSHALL J D. Energy efficient urban form[J]. Environmental Science & Tech- nology, 2008:3133-3136.
4Mayor of London. The mayor's climate change action plan[R]. 2007:35.
5The City of New York. PlaNYC: a green- er greater New York[R]. 2011: 37.