This infographic from DriveSteady provides another explanation for how gas prices rise and fall. It says that 9% of America's gasoline is in the form of ethanol.

Ethanol Across America reports, "Soon, forestry wastes in the northeast, switchgrass and rice straw in California, sugar cane in Louisiana, Hawaii, and Florida, and garbage from everyone will all help America wean its addiction from oil."

Source: DriveSteady