http://www.permaculture-sf.org/monthly-guild-gathering-diy-cold-climate-biogas-unit/ Come to the permaculture guild gathering on August 2nd at 6:30pm to hear David ...
There is no wrong way to build a first biogas digester, so long as it results in the unforgettable experience of seeing the miraculous blue flame of biogas for the first time. Soon afterwards, however ...
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