Kolkata's air quality saw improvement this winter with average PM2.5 concentration dropping to 65 micrograms per cubic metre, yet the city remained the second-most polluted mega city in India ...

Kolkata: This winter (2024-25), from Oct 1 to Feb 28, Kolkata emerged as the 9th most polluted among 22 capital cities in India as far as PM2.5 count in the ambient air is concerned, finds an ...

The Centre for Science and Environment's analysis reveals spiking pollution levels in six megacities, with Delhi recording 68 ...