<http://schema.org/about>
"Many trees are saved when we read magazines online, and many magazines are going that route now. However sometimes it is a poor substitute for the print edition. A magazine flows in an order and style laid out by its designer, and the ads are often as"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/azure-the-green-issue.html>