Pakistan's Lahore ranked as the world's most polluted city on Friday, with its Air Quality Index (AQI) reaching 410, a level classified as hazardous, according to Swiss air quality monitoring platform IQAir. The platform also reported that the city's PM2.5 concentration was 45.2 times higher than the World Health Organisation's annual guideline value.
An AQI reading reflects the level of air pollution and the associated health risks, with higher values indicating more polluted air. Under IQAir's classification, readings above 300 fall into the hazardous category, raising concerns about the potential effects of exposure on public health.
