frogspawn

According to the Associated Press:

“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. That would save about 6.5 billion gallons of gasoline …and Americans would also shed more than 3 billion pounds (flesh) overall, according to these calculations.”