Citizens wear masks among heavy haze in New Delhi, capital of India, Nov. 6, 2016. Air pollution level has remained several times higher after the Diwali festival in northern India. (Xinhua/Stringer)
Citizens wear masks among heavy haze in New Delhi, capital of India, Nov. 6, 2016. Air pollution level has remained several times higher after the Diwali festival in northern India. (Xinhua/Stringer)