U.S. sees delay in big rise in alternative motor fuels.

WASHINGTON - The Bush administration says the United States needs an extra 20 years to meet Congress' goal of having almost a third of U.S. motor fuel supply come from energy sources other than gasoline. Congress passed energy legislation in 1992 mandating that 30 percent of the fuel used to run U.S. cars and trucks by 2010 come from ethanol, natural gas, hydrogen, electricity or other replacement fuels.