This is the third half of the post on power/power production.
Gobar Gas/Gober Gas
Basically, you collect poop, put the poop in a bag, then collect the gas. If you have seen "Mad Max - Beyond Thunderdome" with Tina Turner, you know about gobar/gober gas.
By the way, it's called methane.
The Methane Digester for Biogas
Green Trust - Methane Digesters
rmt131 - Simple Setup for Methane Digester