<http://schema.org/about>
"Perhaps the most dreaded climate 'feedback loop', thawing permafrost in the Arctic may unleash a torrent of heat-trapping methane and CO2. Here's what you need to know. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/climate-change/melting-permafrost-arctic-some-truly-scary-st.html>