If you're not familiar with PBS' American Experience series, you should be. I always have my DVR set to record any new ones - and they have yet to disappoint. That's why I am extra-excited, in that geeky, I love good documentaries kind of way, for the new film by Robert Stone, Earth Days: The Seeds of Revolution, which is set to appear on American Experience.
A big hit at the 2009 Sundance Music Festival, Earth Days chronicles the story of the American environmental movement as told by a few of its progenitors, including: Paul Ehrlich, Stewart Udall, Dennis Meadows and Hunter Lovins. No word yet as to when the program will begin airing on your local PBS station, but I would recommend you keep an eye out because this one looks real good.