New Delhi was ranked the worldâs most polluted city on Friday morning, November 1, a days after Diwali celebrations pushed air quality to hazardous levels, according to Swiss firm IQAir.
According to IQAir world major city quality ranking, the top 10 cities with most-polluted air are:
1. Delhi, India
2. Lahore, Pakistan
3. Beijing, China
4. Dhaka, Bangladesh