đź’¨ Abstract

Delhi remained India's most polluted megacity during the 2024-25 winter, with an average PM2.5 concentration of 175 micrograms per cubic metre. PM2.5 pollution in Delhi decreased compared to the previous winter. Kolkata was the second-most polluted city, followed by Bengaluru, Mumbai, Hyderabad, and Chennai, in descending order.

Courtesy: theprint.in

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