To amend the Clean Air Act to require that gasoline contain at least 15 billion gallons of renewable fuel by the year 2012, and for other purposes.

Amends the Clean Air Act to require that gasoline contain at least 15 billion gallons (currently, 7.5 billion gallons) of renewable fuel by the year 2012). Revises the calculation used to determine the applicable volume of renewable fuel for 2013 and beyond by using the ratio of 15 billion gallons (currently, 7.5 billion gallons) of renewable fuels to the number of gallons of gasoline sold or introduced into commerce in 2012.