<http://schema.org/about>
"Catherine Porter toured West Virginia and writes an astonishing article in the Star about mountaintop removal coal mining. It doesn't take too many people to mine coal this way; in 1950 there were 120,000 coal miners and now there are only 21,000. So"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/friends-of-coal-put-out-the-word.html>