One of many interesting facets of my time working in the southern (very rural) parts of South Korea; the covered farm animal "crap pit" just outside the living quarters, with a small pipe to carry the methane in to the house for lighting and cooking...
And by those standards, that amount would be acceptable, but no way could you get Americans to accept living with what little you get from that, and of course, needing a crap pit right outside the house..
I guess I only really think of it from a what works on a national level sort of thing.