The air of four metropolises is unhealthy and four metropolises are acceptable
The National Air and Climate Change Center of the Environmental Protection Organization announced: Today, Sunday, the air in two cities is unhealthy for sensitive groups, two cities are unhealthy for all groups, and four cities are acceptable.
According to Moj News Agency, according to the report received from the National Center for Air and Climate Change of this organization, the air in the cities of Tehran, Tabriz and Ahvaz is unhealthy for sensitive groups with indices of 129, 104 and 150, respectively, and Karaj metropolis is unhealthy with an index of 162. It is for all groups.
Also, the air in the metropolises of Isfahan, Mashhad, Shiraz and Arak is acceptable with indexes of 80, 96, 83 and 69 respectively.
Air pollution index up to 50 green and clean, between 51 and 100 yellow and acceptable, 101 to 150 orange and unhealthy for sensitive groups, 151 to 200 red and unhealthy, 201 to 300 purple and very unhealthy, more than 300 brown is dangerous.