Maybe someone on here can explain something. With the supposed emphasis on alternative energy, why isn't anyone looking at methane production from sewage treatment plants and isopropyl alcohol (instead of ethanol or methanol). With all the landfills and the need to treat the increased sewage being pumped into our water supply, I would think simultaniously refining methane for heating to augment, not replace, natural gas would be a good thing. Ethanol, at present, cuts into our food supply while methanol is considered too toxic. Isopropyl alcohol is neither and it's already in most fuels as an additive to prevent water buildup. It can also still burn while in combination with water and can be separated from water with a treatment with salt. There are already countless distilleries in place world wide to produce it.