Gasoline prices have been fallling in Colorado. They're down more than 16 cents in the past month, according to GasBuddy.com, which tracks prices around the country. The website says gas in Colorado is 37 cents a gallon cheaper than the national average. But GasBuddy analysts predict nationwide prices will rise this spring, when gas stations switch to a cleaner, but more expensive fuel required by the Environmental Protection Agency. And rising demand in China, India and other countries is pushing up prices globally. CPR's Mike Lamp talks with Patrick DeHaan, a GasBuddy analyst.