Why is Lahore so polluted?

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According to global air quality monitors, Lahore ranked at second place as world’s most polluted cities with an air quality index up to 430. Air quality index or AQI between 0 to 50 is considered okay but anything over 300 is considered ‘hazardous’.

But why is Lahore so polluted?Air quality in Lahore usually worsens during the winter season from October to February when farmers in the wider Punjab province set light to the remnants of crops, producing smoke that adds to smog. At the same time, weather changes mean pollutants remain trapped in the air for longer.

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