As per the Swiss air tracking company IQAir, this level is considered as 'hazardous'.
Authorities in Pakistan’s Punjab province have imposed an “environmental and health emergency” in three cities – Gujranwala and Hafizabad in addition to Lahore – until the situation improves, its chief minister Mohsin Naqvi said this week, reports CNN.
“There shall be a limited movement of people to and from these areas by public and private transport,” a statement from Naqvi’s office said as quoted by the American news channel.
Interestingly, Naqvi’s government has also restricted the gathering of more than four people in one place.