European Union Members

• European Commission (http://ec.europa.eu/environment/climat/emission.htm)
• France
• Germany (http://www.bmu.de/english/emissions_trading/current/aktuell/6943.php)
• Greece
• Ireland
• Italy
• Netherlands
• Portugal (http://www.maotdr.gov.pt)
• Spain
• United Kingdom  (http://www.defra.gov.uk/Environment/climatechange/trading/index.htm)

Regional Greenhouse Gas Initiative (RGGI) Members (www.rggi.org)

• Maine (http://www.maine.gov/governor)
• Maryland
• Massachusetts  (http://www.mass.gov)
• New Jersey (http://www.nj.gov/governor)
• New York (http://www.ny.gov/governor)

Western Climate Initiative (WCI) Members (http://www.westernclimateinitiative.org/)

• Arizona
• British Columbia
• California
• Manitoba
• New Mexico
• Oregon
• Washington

Other Members

• Australia
• New Zealand (http://www.climatechange.govt.nz/nz-solutions/reducing-our-footprint.shtml)
• Norway (http://www.regjeringen.no/en/dep/fin.html?id=216)

Observers

• Japan