The small Dutch town of Hengelo in the eastern Dutch province of Overijssel is testing a new "air-purifying concrete", which could lead to a breakthrough in the fight against pollution.

Experts from the University of Twente developed and tested the concrete paving stones which contain a titanium dioxide-based additive. Under the influence of sunlight they bind the nitrogen oxide particles emitted by cars and turn them into harmless nitrates; which can then be washed clean with rain.

One half of a road under reconstruction is being paved with the new green bricks, and the other half with the ordinary variety. "By measuring the air quality in both areas, we will be able to show the efficacy of the bricks," said the statement.

The road is expected to be finish by the end of the year, with the first air measurements being taken early next year, and first results by next summer. So keep your eyes open for this!

Via PhysOrg.com

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