• African Wildlife Foundation
• Alaska Conservation Foundation
• Appalachian Mountain Club
• Aspetuck Land Trust
• Big Sur Land Trust
• Center for Marine Conservation
• Connecticut Fund for the Environment
• Dian Fossey Gorilla Fund
• Earthjustice
• East Bay Zoological Society (Oakland Zoo)
• Environmental Defense Fund
• Environmental Defense
• Environmental Working Group
• Fanny Dwight Clark Memorial Garden
• Farm Sanctuary
• Friends of the Earth
• Gorilla Foundation
• Izaak Walton League
• Jane Goodall Institute
• Marine Mammal Center
• Nature Conservancy
• Palos Verdes Peninsula Land Conservancy
• Putnam County Land Trust
• Save-the-Redwoods League
• Scenic Hudson
• Sempervirens Fund
• Sierra Club Foundation
• Trust for Public Land
• Walden Woods Project