<http://schema.org/about>
"Think you're among the greenest of the green? Or maybe you're not, but you are interested in all of this green, and how it can help you make green? Too bad there is no symbol or banner you can fly from your front yard to identify"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/get-a-green-certification-for-your-green-lifestyle-with-pinemark.html>