Researchers develop roof tiles to combat air pollution

Researchers at University of California have developed a new titanium dioxide roof tile coating that when applied to an average-sized residential roof breaks down smog-causing nitrogen oxides.
As per their calculations, 21 tonnes of nitrogen oxides would be removed daily if tiles on one million roofs were coated with their titanium dioxide mixture. It was found that the titanium dioxide coated tiles removed between 88% and 97% of the nitrogen oxides.
As per researchers, it would cost just $5 for coating an average-sized residential roof with titanium dioxide.
Nitrogen oxides are produced when certain fuels are burned at high temperatures. Nitrogen oxide reacts with volatile organic compounds in the presence of sunlight to form smog.



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