• UNFCCC
• Environmental and Energy Study Institute
• U.S. EPA Global Warming Site
• International Council for Local Environmental Initiatives
• Intergovernmental Panel on Climate Change
• C2ES

General

• The Climate Trust
• The Energy Foundation
• Environmental Defense Fund
• California Energy Commission
• GHG Protocol Initiative
• Natural Resources Defense Council
• United Nations Environment Programme
• World Business Council for Sustainable Development
• World Resources Institute