The city’s air quality index score touched 1,758 at 12:30PM local time on Nov 18, according to IQAir, which collects global pollution data. A level below 101 is considered acceptable, and scores above 300 are regarded as hazardous.
The concentration of PM2.5 – particulate matter measuring 2.5 microns or less in diameter that can be carried into lungs, causing deadly diseases and cardiac issues – was 130.9 times the World Health Organisation's recommended levels.
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Pakistan has also faced record levels of smog over the past week and seen officials take action, including the closure of schools.