The United States consumes over twenty million barrels of petroleum products each day, over half of which is imported. Oil consumption is currently center stage in the national debate over how to address our oil addiction. Since almost half of our petroleum is used for automobiles, changing the way we power our cars is essential to any solution. A sustainable answer must combine vehicle efficiency, technological innovation, and clean renewable fuels.
Novins, Lisa. "Swithgrass: A New Energy for the Future?" Sustainable Development Law & Policy, Spring 2007, 30.