<http://schema.org/about>
"Trap grease is the malodorous waste grease which restaurants trap before it goes down the sewer. Today, those restaurants pay people to take it away, so trap grease is essentially free. It hasn't been exploited like yellow grease, which is recycled"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/producing-biodiesel-from-trap-grease-fry-o-diesel.html>