<http://schema.org/about>
"By now I'm sure you know that deforestation is a major source of carbon emissions -- in fact more than all the fuel burned for transportation -- which would be enough to worry about, except that when it comes to emissions"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/carbon-emissions-from-amazon-deforestation-increase-as-older-forest-cleared.html>