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1. Add "Solar Appliances" section where people can talk about 12v fridges, 12v air conditioners and such. 2. Add "Biogas" entry in "Other Renewable Energy Sources" section. 3. Add a top band on the homepage, with a list of last few newest threads.

1. Use case based taxonomy noted. 2. Gist on biogas: - you make an artificial stomach in a container (say, a barrel) - use a starter sludge (say, cow dung) with methanogenic bacteria (bacteria that farts methane) - feed it with biomass (say, food waste) via a inlet pipe (the mouth) from time to...

See: https://ludens.cl/paradise/turbine/turbine.html There are several more electronics projects on the site: https://ludens.cl/sitemap.htm

Cooking oil can make biofuel (biodiesel).