Leo was so inspired by Gore, he brought his message to The Oprah Show in October 2005, and even began driving a hybrid car. Leo calls Gore's documentary, An Inconvenient Truth, "astounding."
"I think [An Inconvenient Truth] really blew the lid off the issue in such a major way, and I truly believe it's the obligation of every American citizen to go see this film," he says. "We are the biggest contributor to global warming in the entire world, and if we don't make a difference, we don't change our ways, a lot of things will go terribly wrong. It is one of the single most important issues facing the entire world."