The Dutch town of Hengelo is putting certain concrete paving stones to the test. These said stones contain a titanium dioxide-based additive that, when under the influence of sunlight, bind the nitrogen oxide particles emitted by car exhausts and turns them into harmless nitrates. They plan on measuring the air quality after paving one half of a road with the air-purifying concrete and the other half with the ordinary variety.
Air purification isn’t all this new concrete is capable of, however. It may look like the same old cement but it also repels dirt off the road, providing a smoother driving surface. If only this concrete could cure SARS. It’ll be another year before the tests become conclusive and with the way gas is these days, we’ll all be cutting our cars in half instead of driving on air-purifying concrete.