America's obesity epidemic and global warming might not seem to have much in common. But public health experts suggest people can attack them both by cutting calories and carbon dioxide at the same time.
How? Get out of your car and walk or bike half an hour a day instead of driving. And while you're at it, eat less red meat. That's how Americans can simultaneously save the planet and their health, say doctors and climate scientists.
The payoffs are huge, although unlikely to happen. One numbers-crunching scientist calculates that if all Americans between 10 and 74 walked just half an hour a day instead of driving, they would cut the annual U.S. emissions of carbon dioxide, the chief greenhouse gas, by 64 million tons.
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