Thomas Tietenberg Home Page (Mitchell Family Professor of Economics at Colby College, and extensive research on cap and trade): http://www.colby.edu/personal/thtieten/

Resources for the Future: http://www.rff.org/

The Weathervane (an RFF periodical): http://www.weathervane.rff.org

Environmental Defense: http://www.edf.org/

Cantor Fitzgerald: http://www.cantor.com/ebs/

Natsource LLC: http://www.natsource.com/

Environmental Resource Trust: http://www.ert.net/

Center for Clean Air Policy: http://www.ccap.org/

Emissions Marketing Association: http://www.emissions.org/

ENRON North America: http://www.ect.enron.com/

World Resources Institute: http://www.wri.org/

U.S. Environmental Protection Agency (U.S. Acid Rain Program): http://www.epa.gov/acidrain

Thomas Tietenberg Home Page (Mitchell Family Professor of Economics at Colby College, and extensive research on cap and trade): http://www.colby.edu/personal/thtieten/

Chicago Board of Trade: http://www.cbot.com/

Resources for the Future: http://www.rff.org/

Environmental Resource Trust: http://www.ert.net/

EcoNet: http://www.econet.apc.org/acidrain/

Center for Clean Air Policy: http://www.ccap.org/

Tracking and Analysis Framework (TAF): http://www.lumina.com/taf/index.html

U.S. Environmental Protection Agency (Office of Air and Radiation, Technology Transfer Network): http://www.epa.gov/ttn/

Center for Energy and Environmental Policy Research, MIT: http://web.mit.edu/ceepr/

Environmental Law Institute: http://www.eli.org/

U.S. Environmental Protection Agency (Office of Air and Radiation): http://www.epa.gov/oar/

Center for Clean Air Policy: U.S. Environmental Protection Agency (Office of Air and Radiation, Technology Transfer Network): http://www.epa.gov/ttn/

U.S. Environmental Protection Agency (Technology Transfer Web, Ozone Transport Assessment Group): http://www.epa.gov/ttn/otag/

U.S. Environmental Protection Agency (global warming): http://www.epa.gov/globalwarming/

Resources for the Future: http://www.rff.org/

Environmental Defense Fund: http://www.edf.org/

U.S. State Department (global warming): http://www.state.gov/www/global/global_issues/climate/index.html

United Nations Framework Convention on Climate Change: http://www.unfccc.de/index.html

Center for Clean Air Policy: http://www.ccap.org/

Intergovernmental Panel on Climate Change: http://www.ipcc.ch/

International Energy Agency: http://www.iea.org/

Energy Information Agency: http://www.eia.doe.gov/

Cantor Fitzgerald: http://www.cantor.com/ebs

Natsource LLC: http://www.natsource.com/

Chicago Mercantile Exchange: http://www.cme.com/

Center for Futures Education: http://www.thectr.com/glossary.html

New York Mercantile Exchange: http://www.nymex.com

Winrock International: http://www.winrock.org/

Trexler & Associates: http://www.climateservices.com/

Pew Center on Climate Change: http://www.pewclimate.org/

Climate Change Information Network – JI Online: http://www.ji.org/

International Council for Local Environmental Initiatives: http://www.iclei.org/

Department of Energy – Climate Challenge: http://www.eren.doe.gov/climatechallenge/ccap.htm

UNCTAD: http://www.unctad.org/en/subsites/etrade/

OECD: http://www.oecd.org/env/cc/

Australian Greenhouse Gas Office: http://www.greenhouse.gov.au/emissionstrading/