- Nature.net
 - Includes forums about birds and animals and a collection of watercolours by John James Audubon. - Arctic Circle
- Describing the peoples and environment of the circumpolar north.
- EcoLiving Center
- Featuring forum discussions on health, home, gardening, and living.
- Earth Forums
- Discussions about environmental issues, efficient living ideas, alternative energy, and more.
- Enviroethics
- terratoday.com: The Environmentalist Network
- Environmental news, discussion, blogs, diaries, and more.
- EnviroChat
- An interactive environmental community in a real-time chat environment
- Greenopolis
- Share green ideas and communicate green practices on this environmentally-focused social networking site sponsored by Waste Management.
- Greenvoice
- Online community for environmentally aware people to communicate, collaborate, and voice opinions. Site lists campaigns, green groups, and news related to environment awareness.
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