With gas prices heading north of $4 a gallon, many people and companies are thinking of switching to a more fuel efficient vehicle.
Lets say, like many American families, you are a two car family with an SUV and a full sized sedan. You'd like to replace one of them to save on the cost of fuel. You decide to either exchange the 25 mpg sedan for a 50 mpg Prius, or the 10 mpg SUV for a 20 mpg station wagon.
Which one should you choose? As a new article in Science magazine shows, if you thought switching the sedan for the prius saved more gas you'd be in agreement with most Americans - and you'd be absolutely wrong.