Sure, these Hollywood hotties and rock stars sometimes hop fuel-guzzling charter jets and lead planet-killing concert tours, but their hearts are in the right place. Here are some leaders of the celebrity green movement.
Al Gore lost his bid for the presidency but kept busy -- he went on to become perhaps the most high-profile eco-spokesman in the world and the planet's leading activist against global warming. His work won him both a Nobel Peace Prize and an Oscar for the 2006 documentary, "An Inconvenient Truth."
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