<http://schema.org/about>
"Over the last eight weeks, 30,033 (and counting) Green Challenge participants have pledged to shed 58,678,436 pounds of carbon dioxide, the equivalent of taking 5,998 cars off the road for a year. Now comes the moment of truth: How many of your pledges"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/the-slate-green-challenge-wrap-up-how-low-did-you-go.html>