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"Even the most casual TreeHugger reader knows that we're huge fans of transportation by bicycle; the world's most energy efficient vehicle is good for all sorts of things, including things you might not ordinarily consider, like moving and even getting"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/clif-bar-2-mile-challenge-get-on-your-bikes-and-ride.html>