<http://schema.org/about>
"As I considered a house move, I wondered whether living in a less efficient home in town would cause my carbon footprint to go up or down. Until I realized that was the wrong question. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-home/why-carbon-footprints-can-mess-your-mind.html>