Karachi has been at the top of the list of the world’s most polluted cities for the past consecutive two days.

Dawn newspaper quoted ‘IQAir.com’, an air quality monitoring website, stating that Karachi topped the chart, followed by New Delhi.

The concentration of 2.5 particulate matter (pm) in Karachi is 20.3 times higher than the annual air quality guideline value of the World Health Organization (WHO) as last night it recorded an air quality index of 175.

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Air quality index readings in the range of 151 to 200 are considered unhealthy, while air quality index readings between 201 and 300 are dangerous and severely harmful to health.

According to the annual report released by ‘IQ Air’, the level of pollution in Karachi has not improved over the past few years, in fact it has increased.