Constortium for Agricultural Soils Mitigation of Greenhouse gases: http://www.casmgs.colostate.edu/
US Global Change Research Program: http://www.usgcrp.gov/
Carbon Dioxide Information Analysis Center: http://cdiac.ornl.gov/
Resources for the Future: http://www.weathervane.rff.org/
Carbo Europe: http://www.bgc-jena.mpg.de/public/carboeur/
North American Carbon Program: http://www.esig.ucar.edu/nacp/
