Vehicles run in smog on a street in Beijing, capital of China, Nov. 30, 2015. Smog worsened in north China on Monday as the meteorological center upgraded its alert from yellow to orange, the second most serious alarming. (CNS photo/Su Dan)
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Vehicles run in smog on a street in Beijing, capital of China, Nov. 30, 2015. Smog worsened in north China on Monday as the meteorological center upgraded its alert from yellow to orange, the second most serious alarming. (CNS photo/Su Dan)
