<http://schema.org/url>
<http://www.treehugger.com/clean-technology/gm-shrinks-its-hydrogen-fuel-cell-and-makes-it-cheaper-more-durable.html>
<http://www.treehugger.com/clean-technology/gm-shrinks-its-hydrogen-fuel-cell-and-makes-it-cheaper-more-durable.html>