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Can Concrete Purify the Air?

Posted by John on August 9th, 2008

That’s the question on the minds of citizens in the Dutch town of Hengelo, where officials are paving a road with a special type of air purifying concrete to curb nitrogen oxide pollution from vehicle exhaust.

Engadget reports that the concrete bricks contain a titanium dioxide additive which, when exposed to sunlight, binds with nitrogen oxide particles and breaks them down into “harmless nitrates” that wash away with water. Read more about the concrete that cleans the air