<http://schema.org/about>
"Hugs to Toronto for adopting a new green roof policy. They did a study and found that \"8% coverage of existing rooftops with extensive green roofs, would generate over $300 million in initial cost savings in areas such as stormwater management, combined"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/toronto-goes-green-well-its-roofs-anyways.html>