To amend the Clean Air Act to require that, after the year 2010, all gasoline sold in the United States for motor vehicles contain not less than 10 percent ethanol and that all diesel fuel sold in the United States for motor vehicles contain not less than 5 percent biodiesel, and for other purposes.

Amends the Clean Air Act to require the Administrator of the Environmental Protection Agency (EPA) to promulgate regulations ensuring that after December 31, 2010, all gasoline or diesel motor vehicle fuel sold or dispensed in the contiguous United States contains not less than ten percent ethanol (in the case of gasoline) and not less than five percent biodiesel (in the case of diesel fuel).