PURETi PURETi
Smog-killing coating
Titanium dioxide, typically used as a pigment in toothpaste and an active ingredient in sunscreen, can also, in ultraviolet light, act as a catalyst to break down air pollutants. After 10 years of research, PURETi produced a titanium dioxide nanoparticle spray that dries into a clear coating on almost any surface, including rooftops, fabric, windows and roadways. In tests, coating asphalt roads with PURETi decreased smog-causing pollutants by about 50 percent.