Americans have been gradually getting fatter every year since World War II, and more and more of us have moved to the suburbs during that time, as well. Researchers now think it may be the suburbs that make us fat.
Researcher Arlin Wasserman noticed that when he moved from his native Philadelphia, where he biked everywhere, he gained weight every time. “The move to Ann Arbor, where I logged 15,000 miles a year driving, gained me 15 pounds, even though I was still biking to work,” he says. “But the move to Traverse City gained me another 20.”