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:
Lahore's air quality has reached hazardous levels.
Author's summary: Lahore is the most polluted city.