If you drive a diesel car or truck, you've probably bumped into the term biodiesel. Like most owners, you probably first saw the term biodiesel on the pump (as a mix for ultra-low-sulfur diesel) – and ...

Biodiesel isn't some experimental, high-tech fuel. It's already here, widely used, and made from everyday materials like vegetable oils, animal fats, and recycled cooking grease. Chemically speaking, ...