The city air is at the moment not healthy for the “at risk groups” and the air quality index (AQI) of fine particles smaller than 2.5 micrometers in diameter has increased to 114 in number. The situation is expected to continue till the end of the week (Friday), Mehr news agency reported. The risk groups include cardio-vascular patients, children and the elderly; therefore they should avoid long-term outdoor activity during the week.
