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Solar CITIES IBC Biogas System Tutorial CompleteWhat if you could take household waste and convert it into a valuable fuel with a relatively simple, cost effective technology? It is possi… Started by Less Prone |
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High Efficiency Rocket Stove Mass Heater for Survival [pack]High Efficiency Rocket Stove Mass Heater for Survival [pack] PB Magnet Rocket mass heaters in a nutshell: -heat your home with 80% to 90% l… Started by DTOM |
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