FILE PHOTO: A U.S. flag flutters near shipping containers as a ship is unloaded at the Port of Los Angeles, in San Pedro, California, U.S., May 1, 2025. REUTERS/Mike Blake/File Photo Wednesday's ...

Air quality index is used by government agencies to communicate to the public how polluted the air is. Public health risks increase as the AQI rises. Eight pollutants namely particulate matter PM10, ...