U.S. Environmental Protection Agency
http://www.epa.gov
California Air Resources Board
http://www.arb.ca.gov
State and Territorial Air Pollution Program Administrators /
Association of Local Air Pollution Control Officials
http://www.4cleanair.org
Northeast States for Coordinated Air Use Management
http://www.nescaum.org
National Caucus of Environmental Legislators
http://www.ncel.net
American Lung Association
http://www.lung.org
Blue Skies Alliance
http://www.blueskiesalliance.org
Natural Resources Defense Council
http://www.nrdc.org
Our Children's Earth
http://www.ocefoundation.org
U.S. Public Interest Research Group
http://www.pirg.org
Sierra Club
http://www.sierraclub.org
Center for Energy Efficiency and Renewable Technologies
http://www.cleanpower.org
Environmental Defense Fund
http://www.edf.org
Eco-Portal - the EnvironmentalSustainability.Info Source
http://www.EnvironmentalSustainability.info/
Manufacturers of Emission Controls Association
http://www.meca.org
Institute of Clean Air Companies
http://www.icac.com
The Chemical Hut
http://www.chemicalproducts.net/
Texas Public Employees for Environmental Responsibility
http://www.txpeer.org
Foundation for Taxpayer and Consumer Rights
http://www.consumerwatchdog.org
Climate Ark - Climate Change & Renewable Energy Portal
http://www.climateark.org