The Utah County Health Department wants residents to enlist themselves in the smog police.

People can take a more active part in improving the air quality in Utah Valley by reporting vehicles that put out lots of smoke, said Terre Beebe, bureau of air quality manager. Gasoline and diesel-powered cars and trucks are the county's major sources of carbon monoxide and contribute to other unhealthy pollutants. Statistics show that about 10 percent of the valley's cars account for 70 percent of the pollution, he said.Although local police are authorized to pull over cars spewing heavy smoke, Beebe said they often have more pressing duties. Residents seeing obviously polluting cars may report the license plate number to the air quality bureau at 343-4600. The bureau will work with owners to get the cars tested and repaired.