Podcast: Listen to an interview with Greg MacGillivray

Greg MacGillivray, 61-year-old cofounder of Laguna Beach, California–based MacGillivray Freeman Films and director of the 1998 Imax hit Everest, is as passionate about water conservation as he is about filmmaking. Next up is Grand Canyon Adventure 3D, a film made in partnership with Teva and the Waterkeeper Alliance, set to debut in March 2008. It's a rollicking Colorado River raft trip and stunning plea for action that stars water activist Robert F. Kennedy Jr., kayaker Nikki Kelly, and anthropologist Wade Davis.

"I love the ocean; growing up around Laguna Beach, I spent my summers surfing, diving, and snorkeling. But over the past few decades, I've noticed a remarkable change in California's aquatic environment. So I've been using the power of the Imax medium, with its gigantic screens and supervivid pictures, to get people to fall in love with the ocean. Now the world is moving toward a water crisis. What's happening on the Colorado River is happening all over the world. The water is overused, overdammed, and it's polluted in some places. My goal is that after seeing Grand Canyon, every person in the audience will go home knowing they have to conserve water—even something as simple as installing a low-flow toilet or showerhead, or turning off the faucet while they're brushing their teeth. We go through life so wastefully now; if we can just alter our behavior a tiny bit, it would make a tremendous difference.