<http://schema.org/about>
"Clean, green, alternative energy is teeming all around us in the natural world, and scientists have only begun scratching the surface of how to tap it."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/energy/photos/10-surprisingly-easy-sources-of-alternative-energy/helioculture>