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Riverkeeper is a member-supported watchdog organization dedicated to defending the Hudson River and its tributaries and protecting the drinking water supply of nine million New York City and hudson valley residents. For nearly 50 years Riverkeeper has been New York’s clean water advocate. We have helped to establish globally recognized standards for waterway and watershed protection and serve as the model and mentor for the growing waterkeeper movement that includes over 280 keeper programs across the country and around the globe.

The Sierra Club Foundation bridges the intersection of strategic philanthropy and grassroots advocacy. As a publicly supported charity, we partner with thousands of donors across the U.S. to invest in organizations that have an outsized impact on the health of the planet. To support our vision for a powerful, inclusive environmental movement focused on climate solutions, conservation, and movement building, we give special consideration to charitable programs that reinforce and advance these imperatives.

Earth Island Institute (EII) was founded in 1982 by veteran environmentalist David R. Brower (1912 - 2000) to encourage the efforts of creative individuals on critical ecological issues. EII supports diverse new initiatives and provides a stable base for on-going projects. This network of 60 projects shares central resources and benefits from the synergetic exchange of experience, ideas, and energy. EII has been widely recognized for its unique organizational model that "reduces, reuses, and recycles" resources, freeing individual projects to communicate with their constituencies and to respond quickly to evolving environmental and social justice challenges. Earth Island continues its pursuit of David Brower's ideal of Global CPR -- conservation, preservation, and restoration for planet Earth.

The Surfrider Foundation is a non-profit, grassroots organization dedicated to the protection and enjoyment of our world’s oceans, waves and beaches through a powerful activist network. Founded in 1984 by a handful of visionary surfers in Malibu, California, the Surfrider Foundation now maintains more than 250,000 supporters, activists and members worldwide..

The mission of the Greenbelt Conservancy is to promote, sustain and enhance Staten Island's 2,800-acre Greenbelt through education, recreation, conservation and research. The Greenbelt Conservancy is a not-for-profit organization that works in partnership with NYC Parks.

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

As California State Parks’ statutory non-profit partner, we have a clear mission – to help strengthen parks and inspire all people to experience these extraordinary places. We are an independent 501c3 organization that supports California State Parks. What does it mean to be "the statutory partner?" That just means we were created by an act of the Legislature to address a big need identified by Governor Brown's blue-ribbon panel on the future of parks. The Parks Forward Commission concluded in 2016 that State Parks need a non-profit partner, or what they termed "a support entity." So, we were founded in 2019 to full this important need. Why would a state agency like The Department of Parks and Recreation, need a non-profit partner? Well, the short answer is: the same reason National Parks need the National Parks Foundation. Closer to home, the same reason every public school needs a PTA or parent association. That is, to fund and to implement innovative and critical programs that are not covered by the public funds. Put another way, to be the nimble partner of State Parks, what some have called "the R&D arm" of State Parks. If we want parks to be strong for the next generations, we need to be thinking now about equitable access (making sure that people from all backgrounds can get to and feel welcome at parks), and about climate resilience. Those are two of the key areas of work for Parks California. Parks California is helping make parks more welcoming, inclusive, and climate resilient. We want to be sure parks are strong and available for many generations to come. Thanks for helping!

Endangered Species International (ESI) is strongly committed to reversing the trend of human-induced species extinction, saving endangered animals, and preserving wild places! ESI uses less than 2% of its budget for management and operations. ESI won multiple Top-Rated Awards from GreatNonprofits and has reached the Platinum participation level through the GuideStar Exchange.

To preserve and manage the Appalachian Trail – ensuring that its vast natural beauty and priceless cultural heritage can be shared and enjoyed today, tomorrow, and for centuries to come.

Drive local action for global ocean conservation.

The National Park Foundation, in partnership with the National Park Service, enriches America’s national parks and programs through private support, safeguarding our heritage and inspiring generations of national park enthusiasts. NPF programs fund park conservation and restoration efforts, foster youth engagement, promote citizenship and preserve history in the places where it happened.

From the Arctic to the Gulf of Mexico to the halls of Congress, Ocean Conservancy educates and empowers people to take action on behalf of the ocean. We make ocean issues accessible and engaging, bringing science, political action and communications together to condition the social climate for change and protect the ocean for future generations.