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http://www.engineeringnews.co.za/arti...uilding-climate-resilience-2014-03-31
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Marlin and Loretta’s farm operates using a small amount of off-grid electricity to run the aeroponic Tower Garden® towers and a wood-burning furnace to heat the greenhouse in the winter. The greenhouse itself is Amish-made, with simple hand crank roof vents and roll-up sides for natural ventilation. Although some may not consider the protected greenhouse structure to be state-of-the-art, like we see with many of our vertical aeroponic tower farms, it has proven to be both cost effective and highly efficient as people manually control the simplified environmental mechanisms.
http://futuregrowing.wordpress.com/20...way-to-local-food-security-in-indiana
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