Tourists take photos among heavy haze in New Delhi, India, Nov. 5, 2016. Pollution level has remained several times higher after the Diwali festival in northern India. (Xinhua/Stringer)
Tourists take photos among heavy haze in New Delhi, India, Nov. 5, 2016. Pollution level has remained several times higher after the Diwali festival in northern India. (Xinhua/Stringer)
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