Delhi remained India's most polluted megacity by a wide margin during the 2024-25 winter, with an average PM2.5 concentration of 175 micrograms per cubic metre, according to an analysis released on Tuesday.
However, the Centre for Science and Environment analysis found that PM2.5 pollution in the national capital declined in the 2024-25 winter (October 1 to January 31) compared to the 2023-24 winter (189 micrograms per cubic metre).
Kolkata was the second-most polluted megacity during the 2024-25 winter, with an average PM2.5 concentration of 65 micrograms per cubic metre.
The analysis showed that PM2.5 levels declined in Bengaluru, Mumbai and Kolkata compared to the previous winter but remained the same in Chennai and Hyderabad.
The average PM2.5 levels during the 2024-25 winter were 52 micrograms per cubic metre in Hyderabad, 50 in Mumbai, 37 in Bengaluru and 36 in Chennai.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
The average daily microplastic exposure rose from 10.7 particles in the colder months to 21.1 in the hotter season, the study highlighted.
Monsoon ushers in respiratory trouble for many and pneumonia cases rise sharply, driven by damp air, viral spread, indoor pollutants, and rain-wetting. Children, elderly, and those with compromised immunity are most vulnerable.
Rain lashed several parts of Delhi and the surrounding National Capital Region (NCR) on Saturday evening. Areas including Lajpat Nagar, RK Puram, Lodhi Road, and Mandir Marg witnessed light showers.
In a bid to tackle one of the worst sources of air pollution, Delhi has begun testing retrofitting devices that promise to cut harmful emissions from heavy commercial vehicles by more than 70 per cent.
Delhi is gearing up to build one of India's most advanced e-waste processing facilities, and it's taking cues from Norway's cutting-edge model.
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