There was a guy in Vermont who had a methane digester for his baryard animal poop and somehow converted it to methane to run his farm equipement. This was 25 years ago or so. Pretty thrifty!You can make hydrogen from poop...
Transforming ‘sewer gas’ into clean hydrogen fuel
Scientists have found a new chemical process to turn a stinky, toxic gas into a clean-burning fuel.www.sciencedaily.com
So get poopin'