The following links provide additional information on matters relevant to GHG emissions estimation. To access, click on the specific site below.
American Petroleum Institute (API)
http://www.api.org/ehs/
International Petroleum Industry Environmental Conservation Association (IPIECA)
http://www.ipieca.org/
The International Association of Oil & Gas Producers (OGP)
http://www.ogp.org.uk/
The World Business Council for Sustainable Development (WBCSD)
http://www.ghgprotocol.org/index.htm
U.S Environmental Protection Agency (EPA)
http://www.epa.gov/
Climate VISION (U.S Department of Energy, DOE)
http://www.climatevision.gov
Global Environmental Management Initiative (GEMI)
http://www.businessandclimate.org/
The Pew Center on Global Climate Change
http://www.pewclimate.org/