<http://schema.org/about>
"A few ways to other ways to green your time-keeping: use your cell phone for a phone and a clock, don't wear a watch and just ask your friends for the time, make your own sun-dial. Or, if you just want a watch or enjoy"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/style/quiksilver-makes-first-recyclable-watch-the-ray.html>