<http://schema.org/about>
"GreenBuild is just huge, 800 booths, 30,000 people, there probably are more green vendors and green architects in this room than there are green clients in America. One doesn't even want to think about the carbon footprint of bringing everyone to town"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/greenbuild-so-many-booths-so-much-greenwashing.html>