<http://schema.org/about>
"When distilled to their essential parts, solar ovens are really very simple devices. Using little more than a container and reflective surface, they intensify the rays of the sun to the point"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/how-to-build-a-solar-oven-slideshow.html>