The Sundance Film Festival — at the vanguard of the environmental movement — is known for being the first to premiere eco-friendly films and documentaries. After all, it was here where Al Gore introduced An Inconvenient Truth to the world. And this year's festival, happening Jan. 15 - 25, is no different. Below are some video clips from the festival highlighting its green credentials. Sit back, grab a cup of joe, and enjoy.

Meet Joe Berlinger, the director of Crude — a documentary about the oil industry. And read a post by our blogger Shea about the controversial film.

Meet Louie Psihoyos, the director of The Cove — a controversial documentary about dolphins. Watch and find out the Steven Spielberg connection.

Meet Gene Rosow and Bill Benenson, directors of Dirt! The Movie — a documentary about the ground beneath us.

Hang out in the Brita Green Room at Sundance ... or, in this case, watch the people who do.

For those of you who enjoyed 2003 documentary called The Yes Men, well, you're in luck. The filmmakers premiered a sequel called The Yes Men Fix the World at this year's Sundance Film Festival.

Ever thought you'd watch a movie called Manure? Watch this interview with stars Billy Bob Thornton and Tea Leoni as they discuss this film about farm manure salesmen in the 1960s. 

No Impact Man is a documentary that follows a Manhattan couple as they try to reduce their environmental impact to nothing within the course of a year. Watch this interview with the film's director.

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