8. Brad Pitt and Angelina Jolie
Pardon me for lumping this powerful twosome together, but their might is just that great. They’re both well known for their humanitarian efforts across a variety of causes, one of which happens to be the green movement. Brad, for example, has an interest in sustainable architecture: He has not only narrated Design e2, a PBS television series focused on worldwide efforts to building environmentally friendly structures; but moreover, he founded the Make It Right Foundation in 2006 to finance and construct sustainable, affordable new homes in New Orleans after Hurricane Katrina hit. Angie, meanwhile, started the Maddox Jolie-Pitt Foundation in 2003, which is dedicated to community development and environmental conservation in Cambodia’s northwest province Battambang. Talk about star power!