In article , DejaVU says...

well now, reading a computer publication today i came across another
energy source...... methane.

This has been done for years in places like rural india.
A methane digester can provide cooking gas for several
families IIRC.

Also, at one time, the sewage pumps at Deer Island (boston
harbor) were fueled with methane gas produced on-site.
These are enormous flat radial engines made by, I think,
Nordberg.

Jim

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