Dr. Wolverton has distinguished himself as a scientist. Hundreds if not thousands of small wastewater treatment systems are being used effectively around the world which in good measure are based on his pioneering research. Despite this, there is no evidence that botanical air cleaning can be used effectively under whole-house conditions. High relative humidity is undesirable since it can increase the risk of mold growth on building surfaces and materials and in seasonally- cool climates cause condensation on windows. As indicated in previous IEN articles, such mold growth is highly undesirable.
Plants are beautiful and nothing more.