|
Fondazione Eni Enrico Mattei (Italy)
7
|
International Institute for Environment and Development (United Kingdom)
4
|
Stockholm Environment Institute (Sweden)
4
|
|
Earth Institute (United States)
3
|
Resources for the Future (United States)
3
|
American Enterprise Institute (United States)
1
|
|
Brookings Institution (United States)
1
|
Environment for Development Initiative (Sweden)
1
|
