"We recycle, have solar energy and I drive an electric car, " says David Duchovny (Californication). "We try to set an example. Unfortunately, you need the means to actually be green -- that's what needs to change in this world. It should be cheaper to be green. I can afford to put solar energy in. I can afford to drive an electric car, because I can also have a gas car if I need to drive more than 80 miles in a day."

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.