As I walk past our neighborhood school, I am always amazed at the number of idling cars.  An idling vehicle emits twenty times more pollution than one traveling 32 miles per hour.  Idling is even more polluting inside a garage.  If just 10% of all garage owners were to idle their cars for just five fewer minutes per day, the total savings would be 84.5 million gallons of gar a year.  That's enough for a million people to drive an average-sized car across the country.  Not that's some savings!