<http://schema.org/about>
"Except in the most concrete of the concrete jungles of cities, our urban centers probably absorb far more carbon emissions than current calculations assume. That's the word from a new study examining the carbon"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/climate-change/cities-may-soak-up-10x-more-carbon-emissions-than-accounted-for.html>