Kolkata beats other metros, reports more than 50% of good air days in 4 years: CSE study

Kolkata has emerged as the metro with the best air quality among six major Indian cities, according to a CSE study analyzing data from 2021 to 2025. The city recorded over 50% of 'very good' and 'satisfactory' air quality days, a stark contrast to Delhi's high number of 'severe' pollution days.

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