<http://schema.org/about>
"These amazing tiles could help break down the compounds found in air pollution, and can be used inexpensively for roofs and more."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/university-california-riverside-students-create-smog-sucking-tile-battle-air-pollution.html>