What are the cities with the worst air in the world

20 16 in may, the world health organization listed the cities with the worst air in the world. The city with the worst environmental quality is Zabolai, Iran, which is in sandstorm weather almost all summer. The second and third places are Assam and Allahabad in India; The fourth and fifth places are Riyadh and Jubail, followed by Bassenne and raipur.

At the same time, the World Health Organization said that the ranking was incomplete, and some residential areas with worse environment were not included, because cities in some countries did not have air quality monitoring systems, so it was impossible to assess their air pollution levels.