According to the data released by the Central Pollution Control Board, Varanasi was the most polluted city with air quality index (AQI) touching 276, followed by Lucknow (AQI 269), Muzaffarnagar (AQI 266), Yamunanagar in Haryana (AQI 264) and Moradabad (AQI 256).
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The Air Quality Index, or AQI , is a system of colors and numbers used to communicate the air quality in a region. The AQI color sche...
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