You don't have to have a Hollywood salary to make a difference, and Ed says a garden is a great way to start. Ed and Rachelle grow many fruits and vegetables in their backyard—and Rachelle has brought Oprah some homegrown lettuce and olives! "We maybe produce 25 percent of our food," he says. "But that's 25 percent that's not trucked in with a lot of fossil fuels."

Learn how to start your own garden!

People can also save energy—and a lot of money—by using ceiling fans to cool their homes and by installing energy-saving thermostats. "Rachelle figured it out years ago," Ed says. "She said: 'You don't really care about the environment. You're just cheap.'"

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