Paving blocks sprayed with "smog-eating titanium oxide" were installed a year ago on a street in the Netherlands town of Hengelo. Researchers at Eindhoven University of Technology in the Netherlands found that the "photocatalytic pavement" has cut nitrogen oxide pollution and “this latest research shows the potential of chemically engineered surfaces to further improve our quality of life, especially in major urban areas where traffic emissions are high," says David Brown, CEO of the Institution of Chemical Engineers.

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