MNN - Mother Nature Network

What did the 670,000+ Americans who participated in the clunkers program buy with their cash? The U.S. government gave drivers up to $4,500 each for trading in an old, fuel-inefficient car to use toward the purchase of a newer, more efficient vehicle. The average fuel economy of the vehicles traded in was 15.8 mpg and the average fuel economy of vehicles purchased is 24.9 mpg — a 58 percent improvement. Learn more about the top 10 most-purchased vehicles.