Pakistan's Lahore city ranked as the world's most polluted city on Monday, the second such time in a week's time, with smog reaching hazardous levels way higher than WHO guidelines, a private tech company data showed.

While the Punjab – with Lahore as its capital – does not have its own air quality index, the provincial government said it is actively implementing the Smog Emergency Plan, especially in Lahore.

According to IQAir, Lahore’s air quality index (AQI) rose to a hazardous level -- 312, with its concentration of PM2.5, the most harmful particulate matter, reaching a staggering 190.5 micrograms per cubic meter.

“This level is over 25 times the World Health Organisation’s (WHO) annual air quality guideline. The real-time station ranking for Lahore is painting an even more alarming

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