The 24-hour average for fine particulate matter (PM2.5) stood at 103 on Friday, placing the capital in the category affecting children, the elderly and people with heart or respiratory conditions, the Tehran Air Quality Control Company said.
The 24-hour average for fine particulate matter (PM2.5) stood at 103 on Friday, placing the capital in the category affecting children, the elderly and people with heart or respiratory conditions, the Tehran Air Quality Control Company said.