Air-Plant Filtration Sytem

I have designed and built two prototypes of an air-plant filtration system. The design is based off of the research from Dr. Wolverton, a NASA scientist. http://www.wolvertonenvironmental.com/bcw.htm

The activated charcoal filters a great deal of contaminants out of the air. The plant roots also absorb contaminants from the air as well as from the charcoal. The fan is connected to a solar panel so it uses no coal produced electricity. The watering system is gravity fed and is relatively easy to manage. Again no pumps needed. (Although the current watering system for prototype 1 does use electricity to run the well pump).