Ethanol may have a larger share of the U.S. renewable fuels portfolio under new regulations the Obama administration announced today. U.S. EPA's new analysis of greenhouse gas emissions from renewable fuels finds that if developed in energy-efficient ways, ethanol can have a smaller carbon footprint than gasoline. The long-awaited final regulations lay the groundwork for EPA to implement the renewable fuels standard that Congress included in the 2007 energy bill, which escalated goals for the use of ethanol and other biofuels in U.S. transportation fuels, reaching 36 billion gallons a year in 2022. Go to story #1