A heating system developed by a French innovator decades ago is gaining a new life as a sustainable way to get free hot showers in the modern world. The annual build of the compost shower has just been completed at the Fair Harvest Permaculture Farm in Margaret River WA. The system was developed by French innovator Jean Pain (1930-1981), who used compost to meet all his energy needs. Fair Harvest has perfected the anaerobic compost…