Dutch Town to Be Paved With Air Pollution-Sucking BricksThe small Dutch town of Hengelo is about to test out a new kind of concrete paving slab that actually grabs onto the car-exhaust pollutant nitrogen oxide (a key smog and acid rain ingredient) sucking it out of the air and rendering it harmless. The special bricks contain a component based on titanium dioxide that acts to "fix" the pollutant with the aid of sunlight. The best bit is that the resulting nitrates just wash away with the next rain. Clever stuff: and if the trial results next summer show improved air quality, I'm sure we'll see environmentalists dancing along singing "Follow the green concrete road!" Or something. [Physorg]