Punjab’s capital city passing through dangerously high air quality index (AQI) reading of 1067 on Saturday morning that later improved to 702. Lahore has been on the top of the hazardous air quality list in the world as India’s Kolkata with 253 AQI reading, Delhi, 238, Mumbai 199 and Tashkent in Uzbekistan with 181 reading much behind. Smog in Lahore causing serious health problems for residents toiling in polluted air and reported to have breathing difficulties, coughing and burning eyes.