Leo DiCaprio, King of the (Green) World

Leo DiCaprio loves our Mother Earth. In fact, when it comes to raising awareness for environmental causes, he may just be the greenest star in Hollywood.

He started his foundation, leonardodicaprio.org, to support efforts to sustain the planet in the wake of scary climate change predictions and wide scale pollution. He's produced several environmental documentaries (most notably "The 11th Hour," about global warming, in 2007). And this Sunday, his docu-series, Greensburg (9 p.m. ET), on Planet Green, enters its third and final season.

The show chronicles the efforts of the townspeople in Greensburg, Kansas, which was almost completely leveled by a tornado three years ago. Despite the widespread destruction, Greensburg's inhabitants committed to rebuilding their town as a model for green living. Cameras have followed them on a journey from FEMA trailers to hundreds of new, self-sustaining homes (using options like insulated concrete, geothermal energy, and wind and solar power). 

“Season one we basically showed what Greensburg used to be and how the town was starting over,” field producer Johnny Gould told the Kiawa County Signal newspaper. “Season two was a continuation of that, with the completion of the Incubator the first new retail space in town one of the events we featured.  Season three will be aimed at tying up some of the loose ends of the story lines we’ve followed the first two seasons and showing that here’s a town that’s actually going to make it.”

But not only has this town rebuilt better than before, it's also become a hot destination for ecotourism. DiCaprio probably won't have much time to visit, though. He's also busy developing an eco-friendly resort  in Belize.

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Do you think Leo DiCaprio is the greenest celebrity?

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