What happens to everyone's shit at the moment?
Do we just bury it?
Here, we treat it, dry it, and spread it on grazing land as fertilizer.
I am strongly in favor of this. Poop is a valuable resource, it is excellent fertilizer. I think we should be getting the methane out too. It's a dirty process, but a lot cleaner than fracking.
Using shit as food for methanogens doesn't extract something poop already contains, it uses the poop as a carbon source to feed microbes that synthesize methane as a metabolic byproduct. There are various ways to recycle the energy in shit, some are simply more efficient than others.