In a not so distant future, the battle against air pollution will literally begin at home.
A group of students at the University of California, Riverside tested how roof tiles coated with Titanium Dioxide (TiO2) could affect nitrogen oxides in a chamber.
They found that a thick coating could remove 97% of the target gasses. However, another tile, with just one twelfth the catalyst, removed 88%, suggesting a much more cost effective option. They estimate just $5 will cover the cost of coating for a typical new roof.
Titanium dioxide – a compound used in plastics, sunscreen and food – is capable of fighting pollution as it serves as a photocatalyst. Exposure to ultraviolet light accelerates many chemical reactions including the oxidation of smog producing nitrogen oxides and volatile organic compounds.
Read from the source (iflscience.com) by clicking here.