• Banco Mundial - www.worldbank.org
• Biodiversity and Climate Change Interlinkages - www.biodiv.org
• CCX - Chicago Climate Exchange - www.chicagoclimateexchange.com
• Center for the Study of Carbon Dioxide and Global Change -
  www.co2science.org
• Cites - www.cites.org
• Clean Development Mechanism Watch - www.cdmwatch.org
• EcoSecurities - www.ecosecurities.com
• EPA-United States Environmental Protection Agency - http://www.epa.gov
• Europe Organic Info - www.ewindows.eu.org
• Foundation Joint Implementation Network - www.jiqweb.org
• IETA - International Emissions Trading Association - www.ieta.org
• Net Inform - http://www.netinform.de/startE.asp
• Planet Ark - www.planetark.org
• Point Carbon - www.pointcarbon.com
• Prototype Carbon Fund - www.prototypecarbonfund.org
• Smithsonian Institution - www.si.edu
• UNDP - United Nations Development Programme - www.undp.org
• UNEP - Programa das Nações Unidas para Meio Ambiente - www.unep.org
• Wildlife Conservation Society - http://wcs.org
• World Watch Institute - www.worldwatch.org