Six of the ten U.S. cities with the worst air pollution are in Southern California, report says

Six of the ten U.S. cities with the worst air pollution are in Southern California, report says
Dean Fioresi is a web producer for CBS Los Angeles, covering breaking news in Southern California. A recent report by IQAir revealed that several cities in the Inland Empire are among the most polluted in the country due to high levels of fine particulate matter.