On this day (August 10) in 1893, Rudolf Diesel unveiled the first working diesel engine. It ran on peanut oil. The date is now celebrated as International Biofuels Day. DUQ's Mark Nootbaar spoke with Steel City Biofuels Executive Director Nathaniel Doyno about the future of biofuels in the Pittsburgh area.
Listen to the full story here.
This story originally aired August 10, 2007.