Thermal DePolymerization. Two plants already up and running, turning biowaste into crude oil. Look up "Changing World Technologies," or "Turkey Fuel." The first plant was attached to a turkey processing facility, and turns hundreds of tons of turkey heads, guts, feet blood, feathers and poop into hundreds of barrels of oil per day. It turns a money sink (biowaste needing incineration) into a money source. And the process feeds itself... the energy required to run it comes from natural gas evolved in the process.
I know. It's amazing. I wonder why we haven't implemented it nationwide yet.