For his home near Lake Geneva, physicist Pierre Lehmann has designed a composting toilet, and cleanses his wastewater in a pond where waterplants and billions of microbes remove impurities. Mayan Rainforest Farming - Example of successful rainforest agriculture. Natural Waste Water Treatment - Marsh plants purify waste water. Rammed Earth Construction - Beautiful samples of rammed earth construction. Short Rotation Forestry - Coppicing for maximum yield wood lots.
Artificial wetlands purify waste water.
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