View full lesson: http://ed.ted.com/lessons/biodiesel-the-afterlife-of-oil-natascia-radice

How could you dispose of your cooking oil when you're done cooking? The easiest thing to do might be to pour it down your drain -- but if you save it up and send it to a processing plant, it can gain useful new life as biodiesel, a biodegradable energy source which can run in diesel engines instead of refined petroleum. Natascia Radice describes the process of turning goop into good.

Lesson by Natascia Radice, animation by Lippy.