<http://schema.org/about>
"The snowmobiles that spread virus-like into Yellowstone each winter might be viewed as the working-man's version of the recently designed AeroTrekking vehicle pictured here.  Because this is a rich man's toy, the usual argument for allowing snowmobiles"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/aerotrekking-do-we-need-this-in-wilderness-areas.html>