Tehran Times - Temperature dropped by 1.1 degrees Celsius in Tehran over the Iranian calendar month of Mordad (July 22- August 23) compared to a month earlier, so that ozone pollution is dissipating dramatically, Hossein Shahidzadeh, the caretaker for Air Quality Control Company has said. Ozone in the lower atmosphere is formed by the reaction of ...

Tehran Times - Tehran has just experienced its longest streak of clear air for the past decade, acting director of Tehran Air Quality Control Company has said. During the first Iranian calendar month of Farvardin (March 21-April 20) Tehran air measured by air quality index (AQI) indicated 21 days of excellent air quality and 10 days of good air ...