Students develop titanium dioxide roof tile coating that
removes up to 97 percent of smog-causing nitrogen oxides
A team of University of California, Riverside’s Bourns
College of Engineering students created a roof tile coating that when applied
to an average-sized residential roof breaks down the same amount of
smog-causing nitrogen oxides per year as a car driven 11,000 miles.
They calculated 21 tons of nitrogen oxides would be
eliminated daily if tiles on one million roofs were coated with their titanium
dioxide mixture. They also calculated it would cost only about $5 for enough
titanium dioxide to coat an average-sized residential roof.