Gasoline prices have shot up nearly 20 cents since the start of July and are projected to rise higher yet. Gasoline prices are largely driven by global crude oil prices and usually rise during the summer driving season. But this year, in an ironic twist, they are being pushed up even more in part because US gasoline consumption is much lower than anyone anticipated just a few years ago.

Link to Article: 
Well intentioned but flawed, U.S. biofuel policy in need of change