So the only way we're going to improve fuel economy or appliance efficiency swiftly and to the maximum extent practicable is if the government requires it.
About 60 percent of the oil consumed daily by Americans is used for transportation, and about 45 percent is used for passenger cars and light trucks.
And autos are not the only product that could be made more energy efficient if we just put in place sensible requirements. This is also true of many appliances and even of entire buildings.