The Forbidden City is shrouded with smog in Beijing, capital of China, Dec. 20, 2016. Severe smog lingered in Beijing and many other areas in north China on Wednesday, with over 20 cities issuing red alert for air pollution. (Xinhua/Shen Bohan)
The Forbidden City is shrouded with smog in Beijing, capital of China, Dec. 20, 2016. Severe smog lingered in Beijing and many other areas in north China on Wednesday, with over 20 cities issuing red alert for air pollution. (Xinhua/Shen Bohan)