Smog-Eating Roof Tile

It sounds like science fiction but MonierLifetile's new BoralPure Smog Eating Tile is like a catalytic converter for your roof. The concrete tile contains titanium dioxide, a photo catalyst. When activated by daylight, the catalyst converts harmful levels of nitrogen oxide molecules, a major component of smog, into calcium nitrates. When it rains, the nitrates wash off the roof and fertilize your landscape. The company claims that over the course of a year, 2,000 square feet of tile can destroy as much nitrogen oxide as a car produces from driving 10,800 miles. The tile also inhibits the growth of organisms like algae and moss, and, thanks to its porous structure, dries in half the time of conventional tile.