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Since its founding in 1875, American Forests has pledged to be the pathfinders for creating healthy forests from coast to coast. The nonprofit organization seeks to create healthy and resilient forests, from cities to large natural landscapes, that deliver essential benefits for climate, people, water and wildlife. The organization advances its mission through forestry innovation, place-based partnerships to plant and restore forests, and movement building.

The American Lung Association saves lives by improving lung health and preventing lung disease.

American Rivers, founded in 1973, is dedicated to protecting and restoring healthy natural rivers and the variety of life they sustain, for the benefit of people, fish, and wildlife.

To conserve and restore America's whitewater resources and to enhance opportunities to enjoy them safely.American Whitewater focuses on project within the United States.

The Ocean Cleanup is a non-profit organization developing advanced technologies to rid the world’s oceans of plastic. The Ocean Cleanup has three core approaches to tackling plastic pollution: 1) Clean legacy ocean plastic - Since 2018, The Ocean Cleanup has deployed technologies to remove plastic that has accumulated in ocean garbage patches. It's current system (System 002) has removed more than 225,000 kg of plastic from The Great Pacific Garbage Patch. 2) Turn off the tap: The Ocean Cleanup also develops and deploys Interceptor technologies that prevent plastic from reaching the oceans via rivers, focusing on 1000 rivers that are responsible for 80% of riverine plastic pollution. To date, 19 Interceptor solutions have been deployed across 8 countries. 3) Research: In the process of understanding the problem, The Ocean Cleanup has become a global leader in field research on marine plastic pollution.

The American Forest Foundation works on-the-ground with families, teachers, and elected officials to promote stewardship and protect our nation's forest heritage.

The mission of American Farmland Trust is to save the land that sustains us by protecting farmland, promoting sound farming practices and keeping farmers on the land.

American Bird Conservancy (ABC) is a 501(c)(3), not-for-profit organization whose mission is to conserve native birds and their habitats throughout the Americas.

The mission of the American Littoral Society is to promote the study and conservation of marine life and habitat, protect the coast from harm, and empower others to do the same.

As the national voice for hikers, American Hiking Society helps preserve and protect the hiking trails and natural areas that hikers cherish and seek for exploration, exercise and education.

Founded in 1922, the AHS is among the oldest and most prestigious horticultural organizations in the United States. Our mission is to share the critical role of plants, gardens, and green spaces while helping to create healthy, livable communities and a sustainable planet.The AHS fulfills its mission through educational programming, The American Gardener magazine, Great American Gardeners Awards, Reciprocal Admissions Program, National Children & Youth Garden Symposium, Travel Study Program, and exemplary gardens at our national headquarters, River Farm. AHS work is national in scope.

American Conservation Experience (ACE) is a non-profit organization dedicated to providing rewarding environmental service opportunities that harness the idealism and energy of a volunteer labor force to help restore America’s public lands. ACE is grounded in the philosophy that cooperative labor on meaningful conservation projects fosters cross-cultural understanding and operates on the belief that challenging volunteer service unites people of all backgrounds in common cause.