Delhi overtakes Lahore as world’s most polluted city as air quality drops
India’s capital, Delhi, overtook Lahore in Pakistan to become the world’s most polluted city on Friday, with air quality reaching hazardous levels and visibility dropping as smog blanketed the city of 20 million people. Air quality index (AQI) in Delhi was “hazardous” at 334, making it the most polluted major city globally, according to Swiss group IQAir, which measures air quality levels based on the concentration of toxins An AQI reading up to 50 is considered good with little or no health risk India’s official Central Pollution Control Board pegged…
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