| Desert Fishes Council | CA |
| Difference Makers Media | IL |
| Dogwood Alliance | NC |
| Earth Action | MA |
| Earth Day Network | DC |
| Earth Guardians | CO |
| Earth Island Institute | CA |
| Earth Law Center | CO |
| Earth Rangers | TX |
| EarthAction | MA |
| Earthjustice | DC |
| East Michigan Environmental Action Council | MI |
| Eastern Mennonite Missions | PA |
| Ecology Center of Ann Arbor, Inc. | MI |
| Ecology Mission Group,Central Baptist Church,Wayne | PA |
| Endangered Habitats League | CA |
| Endangered Small Animal Conservation Fund | IL |
| Environment Action | MA |
| Environment America | DC |
| Environmental Action Committee of West Marin (EAC) | CA |
| Environmental Commons | CA |
| Environmental Council of Rhode Island | RI |
| Environmental Defenders of McHenry County | IL |
| Environmental Defense Center | CA |
| Environmental Defense Fund | DC |
| Environmental Education Fund | NJ |
| Environmental Law Society, University of Michigan | MI |
| Environmental Law Society, Vermont Law School | VT |
| Environmental Protection Information Center | CA |
| Episcopal Diocese of Maryland's Committee on the Environment | MD |
| Farallones Marine Sanctuary Association | CA |
| Florida Audubon | FL |
| Florida Conservation Voters | FL |
| Fly Fishers International | MT |
| Forest Carbon Coalition | OR |
| Foundation for Global Sustainability | TN |
| Friends of Animals | CT |
| Friends of Ballona Wetlands | CA |
| Friends of Blackwater | WV |
| Friends of Buttonhook Forest Inc | NY |
| Friends of Merrymeeting Bay | ME |
| Friends of Nevada Wilderness | NV |
| Friends of Swainson's Hawk | CA |
| Friends of the Bay | NY |
| Friends of the Earth | DC |
| Friends of the Rivers of Virginia | VA |
| Friends of the San Juans | WA |
| Friends of the Sea Otter | CA |
| Friends of the Wisconsin Wolf & Wildlife | WI |
| Fyke Nature Association | NJ |
| Garden Club of America | NY |
| Gasparilla Island Conservation | FL |
| Gaviota Coast Conservancy | CA |
| Georgia Highlands College | GA |
| Georgia Native Plant Society | GA |
| Glen Canyon Institute | UT |
| Gotham Bat Conservancy | New York |
| Government Accountability Project | DC |
| Grand Canyon Trust | AZ |
| Grand Canyon Wildlands Council | AZ |
| Grand Canyon Wolf Recovery Project | AZ |
| Great Lakes Indian Fish and Widllfie Comission | WI |
| Great Lakes United | NY |
| Great Old Broads for Wilderness | CO |
| Great Plains Restoration Council | TX |
| Great South Bay Audubon Society | NY |
| Greater Wyoming Valley Audubon Society | PA |
| Greater Yellowstone Coalition | MT |
| Green-Rock Audubon Society | WI |
| Greenbelt Alliance | CA |
| Greenpeace USA | DC |
| Gulf Restoration Network | LA |
| Gulf Specimen Marine Lab | FL |
| HabitatYou | IA |
| Harris Center for Conservation Education | NH |
| Hawk Mountain Sanctuary | PA |
| Heal the Bay | CA |
| Heartwood | IN |
| Hells Canyon Preservation Council | OR |
| Hempen Goods | WI |
| Herpetologists' League | KS |
| Hoosier Environmental Council | IN |
| Howling for Wolves | MN |
| Humane Action Pittsburgh | PA |
| Humane Veterinary Medical Alliance | CA |
| Humane World Action Fund | DC |
| Humane World for Animals | DC |
| Idaho Conservation League | ID |
| Illinois Humane | IL |
| In Defense of Animals | CA |
| Indiana Forest Alliance | IN |
| International Bird Rescue Research Center | CA |
| International Fund for Animal Welfare | DC |
| International Primate Protection League | SC |
| Iowa Wildlife Federation | IA |
| IWLA - Allegheny County Chapter | PA |
| Izaak Walton League, Rapid City, South Dakota Chapter | SD |
| Jackson Hole Conservation Alliance | WY |
| Jane Goodall Institute for Wildlife Research | VA |
| John G. Shedd Aquarium | IL |
