Sens. Maria Cantwell, D-Wash, and Richard Lugar, R-Ind., have unveiled legislation that would promote the production of flex-fuel vehicles. Under the bill, 50% of new vehicles must be able to run on nonpetroleum fuels by 2015, rising to 80% in 2018. "Phasing in vehicles that can run on fuels other than petroleum will allow a whole host of new domestic sources of transportation fuel to come online, which should reduce our dangerous overdependence on foreign oil and help keep American dollars here at home," Cantwell said.