Lahore [ Pak istan], October 19 (ANI): Lahore was ranked the second most polluted city in the world in terms of air quality on Sunday, according to air quality monitoring platform IQAir, Dawn reported.

The Air Quality Index ( AQI ) measures the concentration of pollutants in the air, including fine particulate matter ( PM2.5 ), coarse particulate matter (PM10), nitrogen dioxide (NO2), and ozone (O3). Any IQAir AQI above 150 is considered "unhealthy", and above 200 is "very unhealthy," Dawn added.

The AQI reading for Lahore stood at a very unhealthy 189, Dawn reported. Additionally, levels of PM2.5 were measured at 109 microgrammes per cubic metre of air (mg/m³), 21.8 times higher than the World Health Organisation's annual PM2.5 guidelines. PM2.5 particles measure

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