Here’s something that, if it works, would be great to use to line the streets of smoggy cities. The
The secret is in the sauce, so to speak – titanium dioxide is mixed with the concrete which catalyzes chemical reactions with light exposure. So when sun hits the bricks, the nitrogen oxide (mainly from car exhaust) is turned into nitrates. And then when the rain comes down, the nitrates are washed away with the dust. The university claims the nitrates are harmless, so we wouldn’t run the risk of having just another form of toxin like we do with nitrates from heavy fertilization.
Testing will be going on this year with some preliminary results by next year that will show the effectiveness of the paving stones. Should the stones pull the trick, this could be a pretty cool breakthrough in green construction materials. Especially if cleaner methods of concrete manufacturing is used, since concrete is pretty CO2 intensive to create. Perhaps we’ll even see them in more green housing communities.
Via cnet, photo via University of Twente
written by Mumia, August 12, 2008
written by Sandy, August 14, 2008
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