http://www.developpement-durable.gouv.fr/
An interesting site of New York Times about climate science & policy.
http://www.nytimes.com/interactive/2009/12/07/science/20091207_CLIMATE_TIMELINE.html
Climate Science & Policy
hosts and promotes an open international discussion on climate science, policy and economics.
http://www.climatescienceandpolicy.eu/
Proclim Switzerland
The Swiss Academy of Science point of view