<http://schema.org/about>
"An amazing 70s era photojournalism project called Documerica captured a polluted nation before environmental protections. It has published its archives online, and the photos are breathtaking."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/environmental-policy/what-us-would-look-without-environmental-protections-photos.html>