New rules from the EPA on the carbon footprint do not open the door very wide to more American ethanol production under the mandates of the 2007 energy bill.
On Wednesday, EPA Administrator Lisa Jackson said that because its revised estimate of corn ethanol's carbon footprint show that it's more than 20% greener than gasoline, that it could be part of the mix of advanced biofuels that will be needed to meet a mandate of 36 billion gallons of biofuel use by the year 2022.