Policy papers from major think tanks and research organizations.

International affairs site with working papers, conference proceedings, policy briefs, journal articles, case studies.

Searches the websites of institutions that generate public policy research, analysis and activity. Maintained by Harvard Kennedy School.

Find greenhouse gas emissions inventories by country, national communications that report on countries' climate change policies and measures.

Climate change portal for the United Nations Environment Programme.

Information on the COP21 Paris Agreement and other international actions addressing climate change.

The IPCC was established in 1988 by the UN to provide policymakers with regular scientific assessments on the current state of knowledge about climate change.

Reports and resources on OECD work on climate finance, negotiations, carbon markets, and other topics.

Like the U.S. EPA, the EEA is the official environmental agency of the European Union. The web site provides documents, news, links to other sites.

Initiatives within the European Union.

Large membership includes trade unions, businesses, NGOs, UN agencies and citizen’s groups. Tracks 21 country policies across 6 themes:
https://greeneconomytracker.org/

USDA/ Forest Service

Union of Concerned Scientists

The U.S. Global Change Research Program (USGCRP) is a Federal program mandated by Congress to coordinate Federal research and investments in understanding the forces shaping the global environment, both human and natural, and their impacts on society.