Cut Fat and Carbon at the Same Time

It turns out that fighting global warming is good for the waistline. If every American spent 30 minutes a day walking or cycling instead of driving, the citizenry would collectively cut carbon emissions by 64 million tons and shed 3 billion pounds of excess flab, according to Paul Higgins of the American Association for the Advancement of Science.

Trim even more by trading in that T-bone for tofu--livestock production produces 18 percent of the world's greenhouse-gas emissions, according to the United Nation's Food and Agricultural Organization.

-—Dashka Slater, Sierra Magazine