United Nations Framework Convention on Climate Change (UNFCCC)
The UNFCCC, established in 1992 is the governing body for international GHG negotiations.
www.unfccc.int

The European Union Greenhouse Gas Emission Trading Scheme (EU ETS)
In January 2005 the European Union Greenhouse Gas Emission Trading Scheme (EU ETS) commenced operation as the largest multi-country, multi-sector Greenhouse Gas emission trading scheme world-wide.
http://europa.eu.int/comm/environment/climat/emission.htm

The Intergovernmental Panel on Climate Change (IPCC)
The IPCC has been established to assess scientific, technical and socio-economic information relevant to understanding climate change
www.ipcc.ch

National Oceanic and Atmospheric Administration
http://www.noaa.gov

World View of Global Warming
http://www.worldviewofglobalwarming.org

Global Warming Hot Spots Map
http://www.climatehotmap.org

The Effects of Global Warming (TIME Magazine)
http://www.time.com/time/2001/globalwarming/splash.html

US EPA Global Warming Site
http://yosemite.epa.gov/oar/globalwarming.nsf/content/climate.html

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

International Emissions Trading Association (IETA)
http://www.ieta.org