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المشهد
The Most Polluted City
New Delhi topped the list of the world’s most polluted cities, surpassing Lahore, as dense smog reduced visibility in the city of around 20 million people. IQAir recorded an Air Quality Index of 334, while India’s Central Pollution Control Board measured 403 and classified conditions as “severe.” The discrepancy reflects differences in measurement methods. Pollution worsens in winter as pollutants become trapped close to the ground, compounded by vehicle emissions, construction dust and smoke from crop-residue burning.
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