Actress Alicia Silverstone is anything but "Clueless" about how even people who hate to exercise can protect the planet. In her book, "The Kind Diet," she writes about the environmental perks of eating healthy grub. Dr. Billy Ingram/WireImage.com - October 15, 2009
Celebs Save the Planet
Check out pics of Hayden Panettiere, Brad Pitt, and more stars who are doing their part.