Tehran Smog Recedes in January

The hand of nature, rain and wind, has pushed away the suffocating blanket of smog that had covered Tehran, making air in January a tad cleaner compared to the previous month.
Based on the data released by Tehran Air Quality Control Company, although the skies were brighter compared to a month earlier, Tehran residents breathed higher doses of toxic emissions in January 2021 compared to the same month in 2020.
A close analysis of Air Quality Index during the period makes this very clear. AQI is used by government agencies to announce the prevailing level of air pollution, or how polluted it is forecast to become.
The index categorizes conditions dictated by a measure of polluting matters into good (0-50), moderate (51-100), unhealthy for sensitive groups (101-150), unhealthy (151-200), very unhealthy (201-300) and hazardous (301-500).
In January, people in Tehran did not see clear blue skies even for a single day, while the city recorded moderate status for 10 days, as the index hovered between 51 and 100.