If you're wondering what a disgusting pile of used cooking oil does, the answer is: biodiesel.

Instead of just throwing it away safely,we can turn it into something useful.And if you're wondering what anyone could possibly want with a bunch of digusting, used cooking oil,the answer is: biodiesel.You've probably heard of diesel engines.They power farming and construction equipment,trucks, buses, ships, trains, backup generators,and even some cars.Most of the fuel that feeds these engines is refined from petroleum,which comes from long-dead dinosaurs and other ancient fossils.