3. Leonardo DiCaprio
Where to begin with Leo? He flies commercially instead of chartering private jets. He drives only electric or hybrid vehicles. He installed solar panels on his house. While he was shooting Blood Diamond, he worked with orphaned children from the SOS Children’s Village in Mozambique. He’s donated millions to causes like the Haiti relief efforts (he auctioned himself off for this one, too!) and the Wildlife Conservation Society. Oh yeah, and he started the Leonardo DiCaprio Foundation to support efforts geared towards securing a sustainable future for the planet and all of its inhabitants. He’s definitely got the green stamp of approval.