A road in the small Dutch town of Hengelo will be paved with an air-purifying concrete, or that’s the claim about it.
The University of Twente developed and tested concrete paving stones contain a titanium dioxide-based additive.
Under laboratory-controlled sunlight, the additive, which comes from a Japanese invention, binds the nitrogen oxide particles emitted by car exhausts and turns them into harmless nitrates.
The road should be done by the end of this year, with the first real-world tests of its effectiveness next summer.
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