• Paul G. Allen Forest Protection Foundation
• Beldon Fund
• The Brainerd Foundation
• Council of Michigan Foundations
• Consultative Group on Biological Diversity
• Doris Duke Charitable Foundation
• Duluth-Superior Area Community Foundation
• Environmental Grantmakers Association
• The Joyce Foundation
• W.K. Kellogg Foundation
• League of Conservation Voters Education Fund
• Lumpkin Family Foundation
• The McKnight Foundation
• Charles Stewart Mott Foundation
• David and Lucille Packard Foundation
• William Penn Foundation
• The Pew Charitable Trusts
• Rockefeller Family Fund
• Surdna Foundation
• Town Creek Foundation
• The Village Fund
• Weyerhaeuser Family Foundation

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