United Nations Environment Programme Finance Initiative (UNEP FI)

UNEP Sustainable Energy Finance Initiative (SEFI)

UK Department of Energy and Climate Change

UK Forestry Commission

Cleantech Venture Network

Environmental Finance

Water Online 

International Emissions Trading Association (IETA)

International Water Association (IWA)

International Solid Waste Association (ISWA)

American Council On Renewable Energy (ACORE)

Stanford University - The Global Climate and Energy Project (GCEP)

Imperial College - Centre for Energy Policy and Technology (ICCEPT)

National Renwable Energy Laboratory (NREL)

Sandia National Laboratories - the Water Initiative