Leonardo DiCaprio, Mark Ruffalo & 14 Other Inspiring Environmentalist Celebs

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Leonardo DiCaprio is known for many things: as one of the best actors of our times, as a lover of beautiful ladies, and as a strong champion for planet Earth. Sure, he is human and has his vices, but DiCaprio has been a fervent supporter of environmental and animal conservation efforts throughout most of his career. This week, Leonardo DiCaprio joined forces with Mark Ruffalo as they launched 100%, "a campaign aimed at making energy from renewable sources available to everyone," according to the Associated Press.

Ruffalo spoke to supporters at the event, saying, “This is really mankind’s greatest threat, and it should take some serious problem solving on all of our parts, and we don’t really have to give up anything to do it ... We will be collecting the sun and the wind that falls on us every single day.”

It really is a beautiful thing to see two Hollywood celebrities use their platform for a cause that is equal in importance to every living being on this planet. In fact, there are a few stars who have done the same. Click through for some of Hollywood's most eco-friendly celebrities.

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