- World Land Trust - Conservation charity concerned with the protection of the world's most biologically important and threatened habitats. Includes projects, news and press releases, sponsors, and ways to contribute.
- John Muir Trust - Owns and manages land in the highlands and islands of Scotland. Provides membership information, conservation activities, policies, links, and staff details.
- The Margaret and Luke Pettit Environment Preserve, Inc. - Sixty acres of land was donated to allow for environmental studies and educational experiences for students. Located near Cartersville, Georgia, USA.
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