American Farmland Trust - works to stop the loss of productive farmland and to promote farming practices that lead to a healthy environment.
American Forests - the nation's oldest nonprofit citizen organization founded in 1875 by citizens concerned about the waste and abuse of the nation's forests.
Aquatic Ecosystem Restoration Foundation - a nonprofit corporation created to conduct and support applied research in the management of aquatic pest species, with a focus on nuisance vegetation.
Association for the Environmental Health of Soils - created to facilitate communication and foster communication among professionals concerned with the challenge of soil protection and cleanup.
Defenders of Wildlife - dedicated to the protection of all native wild animals and plants in their natural communities.
Ducks Unlimited - mission to fulfill the annual life cycle needs of North American water fowl by protecting, enhancing, restoring and managing important wetlands and associated uplands.
Ecological Society of America - a non-partisan, nonprofit organization of scientists founded in 1915 to stimulate sound ecological research and promote the responsible application of ecological knowledge to public issues.
Environmental Council of the States - the national non-profit, non-partisan association of state and territorial environmental commissioners.
Environmental Defense Fund - representing 300,000 members, combines science, economics, and law to find economically sustainable solutions to environmental problems.
Environmental Working Group - a leading content provider for public interest groups and concerned citizens who are campaigning to protect the environment.
Everglades Foundation - part of Save Our Everglades Organizations, with a mission to pursue solution oriented and taxpayer neutral approaches to preserving and protecting the haunting splendor of the Florida Everglades ecosystem.
League of Conservation Voters - works to create a Congress more responsive to environmental concerns.
National Association of Conservation Districts - non-governmental, nonprofit organization that represents nearly 3,000 conservation districts across the nation.
National Association of Resource Conservation and Development Councils - established in 1988 to represent America's 315 Resource Conservation and Development Councils.
National Audubon Society - mission to conserve and restore natural focusing on birds and other wildlife for the benefit of humanity and the earth's biological diversity.
National Endangered Species Act Reform Coalition - lobbying organization composed of rural irrigators, municipalities, farmers and electric utilities dedicated to seeking legislative reform of the Endangered Species Act.
National Resources Defense Council - working to preserve the nation's resources and environment for future generations.
National Water Resources Association - a non-profit federation of state organizations whose membership includes rural water districts, municipal waster entities, commercial companies and individuals.
National Wildlife Federation - the nation's largest member-supported conservation education and advocacy organization.
National Wildlife Refuge Association - the only national membership conservation organization devoted solely to the protection, perpetuation and expansion of the National Wildlife Refuge System.
Nature Conservancy - international nonprofit organization whose primary purpose is to protect ecologically significant natural areas and the life they shelter.
Northern Plains Resource Council
Pheasants Forever - a nonprofit conservation organization founded in 1982 in response to the decline of the ring-necked pheasant population.
Society for Range Management - committed to land stewardship and social justice principle's which ensure Montana's air, land, water and unique quality of life are maintained and improved.
Society of Wetland Scientists - a non-profit organization founded in 1980 to promote wetland science and the exchange of information related to wetlands.
Soil and Water Conservation Society - a non-profit, scientific and educational organization of professional conservationists.
Soil Science Society of America - the professional home for over 6,000 professional throughout the world dedicated to the advancement of soil science.
Sierra Club - a national non-profit public interest organization that promotes conservation of the natural environment by influencing public policy decisions.
The Wilderness Society - founded in 1935, it works to protect America's wilderness and to develop a nation-wide network of wild lands through public education, scientific analysis and advocacy.
Wildlife Management Institute - a private, nonprofit, scientific and educational organization committed to the conservation, enhancement and professional management of North America's wildlife and other natural resources.
World Resources Institute - provides information, ideas and solutions to global environmental problems.
World Wildlife Fund - the world's largest independent conservation organization with 4.7 million supporters and a global network active in some 100 countries, whose mission is to protect nature and biological diversity.
Worldwatch Institute - dedicated to fostering the evolution of an environmentally sustainable society - one in which human needs are met in ways that do not threaten the health of the natural environment or the prospects of future generations.