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Vehicles move on a road in heavy fog in east Pakistan's Lahore on Nov. 10, 2017. Smog enveloped many parts of Pakistan on Friday. (Xinhua/Jamil Ahmed)
Vehicles move on a road in heavy fog in east Pakistan's Lahore on Nov. 10, 2017. Smog enveloped many parts of Pakistan on Friday. (Xinhua/Jamil Ahmed)