"I'm getting a Prius" says Hayden Panettiere (Heroes). "No one grouses me anymore about my car -- it's driving me crazy enough with the gas. Once you get your license, you have that urge to drive that nice car. I did it, and I'm over it, so I'm ready."

What little things can you do to help the environment? Find out in iVillage's special iGo Green section. Plus: Pair hot stars like Cameron Diaz and Leonardo DiCaprio to their green cause in Celebrity Matchmaker: Green & Famous.