Drivers in every US state except Hawaii and Alaska could be pumping petrol containing ethanol by 2012 if a plan approved by the Senate becomes law, according to an Associated Press (AP) report published in the New York Times. AP said the proposal, incorporated in a broad energy bill, would change how refiners blend petrol and how they meet clean-air requirements. It would require doubling the use of ethanol, to at least five billion gallons a year, in what would be a boon to corn farmers.