<http://schema.org/description>
"The accumulation of dust and sand on solar power reflectors and photovoltaic cells \u2013 also known as soiling \u2011 is one of the main efficiency drags for solar power facilities, often reducing reflectivity up to 50 percent in 14 days."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.pfonline.com/blog/post/self-cleaning-solar-panel-coating-optimizes-energy-collection-reduces-costs>