The National Environmental Education Foundation (NEEF) is a prominent nonprofit organization in the U.S. focused on lifelong environmental learning. Its mission is to promote environmental stewardship through education and engagement, particularly concerning America's public lands and broader environmental issues. NEEF builds partnerships between government, the private sector, and the public to enhance environmental awareness and action.

NEEF offers a variety of educational resources, including toolkits, infographics, and interactive online programs designed for both classroom and outdoor learning. It provides specialized toolkits for educators on topics like native habitats and biodiversity, as well as programs like SunWise, which teaches K-8 students about sun safety. The organization also runs the EMPOWER campaign to educate youth about managing asthma in relation to environmental factors. Additionally, NEEF supports volunteer events such as National Public Lands Day and offers professional development for environmental educators. Through these initiatives, NEEF fosters environmental literacy and health awareness across the United States.