<http://schema.org/about>
"We usually give coal the stink eye for the ways it harms the earth's surface when it is extracted, and the way it harms the earth's systems when it is burned. But we also need to hone in on the way coal harms"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-water/we-waste-emhow-muchem-water-on-coal.html>