<http://schema.org/about>
"While the scientists involved say there is no current reason for alarm, and that more study is needed to determine exact causes, pay attention to this one: Following up on a story that emerged back in August, BBC News"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/more-methane-discovered-bubbling-from-arctic-sea-floor-1000-times-background-levels-in-places.html>