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Smog continues to grip several areas of Punjab including Lahore, Islamabad, Khanewal, and Faisalabad for the last couple of days.

Residents of Punjab again woke up to a blanket of smog on Tuesday as air quality deteriorated sharply, triggering warnings that even healthy people were at risk of respiratory problems.

Dense smog continues to exist over Lahore, Islamabad, Khanewal, Bhakkar, Pindi Bhattian and other cities in the province.

The fog is triggered by temperature inversion – the formation of a static layer of cooler air close to the ground as the nighttime temperature drops. Normally, air closer to the ground is warmer than the air above it and therefore rises.

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