<http://schema.org/about>
"In news that shouldn't shock anyone, San Francisco and Portland are named two of the top cities with the greenest homes in rankings released by Redfin."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/blogs/rounding-up-the-usual-suspects-top-10-cities-with-the-greenest-homes>