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)
Photo taken on Nov. 6, 2016 shows a metro train travelling among heavy haze at Faridabad, on the outskirts of New Delhi, capital of India. Air pollution level has remained several times higher after the Diwali festival in northern India. (Xinhua/Stringer)
