Fatter Americans, Hotter World

| Wed Oct. 25, 2006 2:01 PM EDT

American's ever-expanding waistlines aren't just bad for our national health - they're bad for the atmosphere too. A new study from the University of Illinois at Urbana-Champaign found that the extra drag on car engines caused by their drivers' increasing weight means that Americans are using at least 938 million more gallons of gas annually today than they were four decades ago, when they weighed an average of 24 pounds less.