<http://schema.org/about>
"Over the past year or so, as climate change (or is it climate chaos?) has moved closer to the forefront of the world's collective consciousness, we've seen relative carbon footprints for just about everything. From burgers to furniture to UK produce to"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-home/the-carbon-footprint-of-christmas.html>