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

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

http://www.unep.org
United Nations Environmental Programme

http://www.undp.org/seed/eap/Climate_Change/CC_and_SD.html
Energy & Atmosphere Programme

http://www.cgiar.org:80/research/res_climate.html
Consultative Group on International Agricultural Research

http://www.mct.gov.br/clima
Ministério da Ciência e Tecnologia

http://lba-ecology.gsfc.nasa.gov/lbaeco/
LBA-Ecology Project Offic

http://www.epa.gov/globalwarming/actions/agforestry/agenv.html
United States Environmental Projection Agency

http://www.giss.nasa.gov/
Goddard Institute of Space Studies