Yazd Enduring Dirtiest Month in Over Two Years

The central province of Yazd is going through the most polluted Iranian month caused by the spread of dust particles since at least March 2016, a provincial weather official said.
"Yazd has so far suffered ten days of unhealthy air quality in the current month of Khordad [beginning May 22], compared to one recorded polluted day in the same month last year and seven days in the year before," Mostafa Mirzadeh said in an interview with IRNA.
"Air Quality Index hit a range of 150-200, an alarming level for all groups," he warned on Tuesday, predicting the situation will continue on a declining trend toward the end of the day.
The AQI measures the concentration of particulate matter and other pollutants in the air.