FILE - Smoke pours out of a steel factory in Lahore, Pakistan, Monday, Nov. 22, 2021. On Tuesday, the Switzerland-based air quality information platform IQair, an international air quality monitoring company says Pakistan’s cultural capital of Lahore has became world’s third most polluted city amid increasing smog behind Dhaka and Mongolia’s Ulaanbaatar city on the pollution index. (AP Photo/K.M. Chaudary, File)

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