Paving slabs could scrub out 70% of the pollution in the air

The slabs, developed by the Fraunhofer Institute for Molecular Biology and Applied Ecology, convert nitrogen oxide into nitrates using a photocatalytic mechanism (titanium dioxide acts as a photocatalyst). According to Fraunhofer, the slabs work well over time, and testing has shown that no changes will occur in the slabs’ degradation capabilities even after 23 months of use. Incredibly, these slabs can scrub out up to 70% of nitrogen monoxide and dioxide in the air.