Smog-eating tiles gobble up air pollution - CNN

"Yes," claims John Renowden, vice president of technology at Boral Roofing, a U.S. company that has introduced a line of roof tiles that they say have pollution-busting properties. Based near Los Angeles, the most ozone-polluted city in the U.S ...

Source: http://www.edition.cnn.com/2012/05/04/tech/smog-eating-tiles-california/index.html?hpt=hp_c2

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