Lahore has once again topped the list of the world's most polluted cities, with air quality levels reaching hazardous levels.
According to the Environmental Protection Agency (EPA), Lahore's Air Quality Index (AQI) surged to 332, placing it in the "hazardous" category.
The EPA classifies AQI readings as follows:
AQI reading between 0 and 100 is considered clean and healthy.
Author's summary: Lahore tops the list of polluted cities.