| ecnc.nl | European Centre for Nature Conservation |
| easi.org | Environmental Alliance for Senior Involvement |
| ucdavis.edu | Information Center for the Environment (ICE), University of California, |
| cpeo.org | Center for Public Environmental Oversight |
| conservationfoundation.co.uk | Conservation Foundation |
| cnie.org | Center for the National Institute for the Environment |
| chebucto.ns.ca | The Ecology Action Centre |
| cechouston.org | Citizens s Environment Coalition |
| thelloydcenter.org | The Lloyd Center for Environmental Studies |
| wri.org | WRI Program: Sustainable Enterprise Program |
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