<http://schema.org/url>
<http://www.engadget.com/2007/04/30/energytree-pc-concept-ransoms-a-tree-to-make-you-conserve-energy/>
<http://www.engadget.com/2007/04/30/energytree-pc-concept-ransoms-a-tree-to-make-you-conserve-energy/>