<http://schema.org/about>
"Parking lots, patios and other paved areas could one day collect rainwater, purify it then channel it to underground tanks for reuse, say researchers. Professor Simon Beecham, a civil engineer from the University of South Australia, says special porous"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/pavers-to-collect-and-purify-rainwater.html>