Even if you don't sport a hybrid car, and you sometimes forget to recycle, here's another way you can save the planet—and get skinny to boot: Lace up those walking shoes.

One scientist estimated that if everyone in the United States substituted an hour of walking a day for driving the same distance, oil consumption would be slashed by 38 percent. And the average Joe would burn 26 pounds a year!

It all adds up
A daily walk is one small step for you, but possibly one major collective step forward for humankind. If we all were a little less car-minded and a little more walking-minded, it would save billions in healthcare costs related to obesity. And what if those savings were applied to carbon-abatement programs? It's estimated that climate protection on that scale could reduce carbon emissions by up to 35 percent.

More ways to be green and healthy
Eco-friendly habits and age-reduction habits often go hand in hand. Here are a few more ways to save the planet and make your RealAge younger at the same time:

• Add some greenery to your home.
• Drink more water. From the tap!
• Kick chemicals out of your house.

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