<http://schema.org/about>
"Carbon offsetting provokes a powerful emotional response in some people. They just don't like the idea that you can pay someone else to mop up your carbon emissions. It smacks of indulgence and cheating. Critics say buying an offset while continuing to"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/zerofootprint-guides-offsetting-offsetting-as-a-sop-to-the-conscience.html>