<http://schema.org/about>
"A few weeks ago, I wrote in this column about the problem of soil erosion. Today I'd like to talk about solutions. (For full details, go to Chapter 8 in Plan B 2.0: Rescuing a Planet Under Stress and a Civilization in Trouble.) "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/conserving-and-rebuilding-soils.html>