<http://schema.org/about>
"The bicycle has many attractions as a form of personal transportation. It alleviates congestion, lowers air pollution, reduces obesity, increases physical fitness, does not emit climate-disrupting carbon dioxide, and is"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/cars/the-welcome-return-of-the-bicycle.html>