<http://schema.org/about>
"There's no doubt that Arctic permafrost stores a huge amount of greenhouse gases and as the planet warms and the permafrost thaws the climate change impact could be huge. Well, according to a new"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/only-10-of-permafrost-melting-could-tip-planet-towards-catastrophic-warming.html>