NEW YORK (CNNMoney.com)-- Gas is expensive. Old vegetable cooking oil from restaurants is free. A car can actually run on either. So why aren't more people ditching petroleum and running on peanut ...

A council's vehicle fleet will be fuelled by leftover vegetable oil as part of a move to reduce carbon dioxide emissions in Derbyshire. Bolsover District Council said its 130 vehicles would be run on ...