Usage:
| American Farmland Trust |
| American Indian College Fund |
| American Red Cross |
| American Rivers |
| Arbor Day Foundation |
| Art Batch Consortium |
| Atlanta Botanical Garden |
| Big River Magazine |
| Borns Consortium |
| California State Parks Foundation |
| Central Park Conservancy |
| Chesapeake Bay Trust |
| Children's Medical Center Fdtn |
| Colonial Williamsburg Foundation |
| Cornell Lab Of Ornithology |
| Denver Museum of Nature & Science |
| Ducks Unlimited |
| Earthjustice |
| Environmental Defense Fund |
| Food Bank for NYC |
| Food Banks Consortium |
| Friends Of The Earth |
| Friends of the Forest Preserves |
| Galapagos Conservancy |
| Greater Chicago Food |
| Greater Public |
| Green Chimneys |
| Habitat for Humanity |
| High Country News |
| Housatonic Valley Assocation |
| Humane Society of U.S. |
| International Crane Foundation |
| International Fund Animal Welfare |
| Jane Goodall Institute, The |
| KBTC Public Television |
| League of Conservation Voters |
| League of Women Voters |
| Massachusetts Audubon Society |
| Meals on Wheels Co-Op |
| Memorial Park Conservancy |
| Minnesota Conservation Volunteer |
| Mono Lake Committee |
| MSPCA |
| National Aquarium In Baltimore |
| National Geographic Development |
| National Museum American Indian |
| National Park Foundation |
| National Trust/Historic Preservtn |
| Natural History Museum/LA County |
| Natural Resources Defense Council |
| New Hampshire Food Bank |
| New Jersey Audubon |
| North Texas Food Bank |
| NY Landmarks Conservancy, The |
| Ocean Conservancy, The |
| Oregon Environmental Council |
| Pacific Crest Trail Association |
| Palm Beach County Food Bank |
| PBS SoCal - KOCE-TV Foundation |
| Pennsylvania Magazine |
| Public Radio/Television |
| Public Television |
| Rails To Trails Conservancy |
| Rensselaer Plateau Alliance |
| Sierra Club |
| Smithsonian Magazine |
| Space Center Houston |
| SPCA of Texas |
| Special Olympics International |
| Texas Children's Hospital |
| Tiger Creek Wildlife Refuge |
| Tree People |
| Trustees of Reservations |
| Turtle Island Restoration Network |
| UNC Public TV |
| WETA/Channel 26 |
| WHYY |
| Zoo Consortium |
