Part of the Government Series, Energy: from TheCapitol.Net Biofuels have grown significantly in the past few years as a component of U.S. motor fuel supply. Current U.S. biofuels supply relies primarily on ethanol produced from Midwest corn. Today, ethanol is blended in more than half of all U.S. gasoline (at the 10% level or lower in most cases). Federal policy has played a key role in the emergence of the U.S. biofuels industry in general,...