Earth Day

Well, since today is Earth Day, I'll link to some free-market environmentalist organizations. Here is the Thoreau Institute and here is NewEnvironmentalism.org, which is a project of the Reason Public Policy Institute. For more info click here.

Update: Here is another one, the Property and Environment Research Center.
Update 2: Here is yet another one, A Better Earth which is a project of the Institute for Humane Studies.