Meet the True Green Hollywood Celebrities

By Marc Lallanilla, About.com Guide

Not many people have the clout to convince stars to arrive at the Oscars in a hybrid vehicle like he does, but Leonardo DiCaprio has that kind of pull. His documentary The 11th Hour -- which the actor wrote, narrated and co-produced -- highlighted the impact humans have had on the environment. He also hosted Planet Green’s Eco-Town series on the sustainable rebuilding of a Kansas town that was destroyed by a tornado. DiCaprio even maintains a blog on environmental issues and green living.