<http://schema.org/about>
"What does 'sustainability' mean to you? This photo selection from JPG Magazine, illustrates 'strides people are making toward becoming sustainable; whether it's a big change in your community or a small tweak to your daily routine.'"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/what-does-sustainability-look-like-photos-from-around-the-world-slideshow.html>