Where does most of Tucson air pollution come from?
Over 60% of Tucson’s air pollution is caused from motor vehicle usage (cars, trucks, planes, trains, and construction equipment). Even though newer vehicles create less air pollution, Tucson’s air isn’t getting cleaner because more people are driving more miles. The remainder of Tucson’s air pollution comes from other sources including power plants, industries, businesses, our homes and products we use.
