Located in the Los Angeles area, Boral Roofing is more than aware of the destructive properties of smog and has come full circle with their new ‘smog-eating tiles’. They have added a titanium dioxide coating to each tile, which has the ability to act as a photo-catalyst by oxidizing the typically harmful pollutants that are emitted by fossil fuel burning. The process occurs when the tiles are exposed to sunlight allowing the titanium dioxide to break down nitrogen oxides in the air and then turns them into harmless calcium nitrate. This washes off the roof with regular precipitation and acts as a garden fertilizer. The price is actually quite appealing, as it only adds around $600 to $1,000 to the cost of regular tile roofing. The tiles on a 2,000 sq ft home can oxidize enough nitrogen oxides to equal driving 10,000 miles in a standard car.
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