Ozone Pollution Suffocating Tehran

The Iranian capital city of Tehran, which has long been notorious for high levels of toxic emissions, is recently breathing ground-level ozone—an uncommon type of air pollution.
Scientific studies have shown that ground-level ozone is a secondary pollutant, formed when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants and other sources react chemically in the presence of sunlight.
Detailed charts released by Tehran Air Quality Control Company indicate that ozone pollution has hit a record in Tehran's history of poor air conditions.
TAQCC reports that since the beginning of the current Iranian year (March 21), ground-level ozone has been responsible for 15 days of air pollution.