Air quality index (AQI) in Delhi was "hazardous" at 334, making it the most polluted global major city, according to Swiss group IQAir, which measures air quality levels based on the concentration of toxins
Air quality index (AQI) in Delhi was "hazardous" at 334, making it the most polluted global major city, according to Swiss group IQAir, which measures air quality levels based on the concentration of toxins
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Air quality index (AQI) in Delhi was "hazardous" at 334, making it the most polluted global major city, according to Swiss group IQAir, which measures air quality levels based on the concentration of toxins
