TNPCB data on Deepavali underplays real extent of air pollution, says environmental group

According to the Tamil Nadu Pollution Control Board, Chennai’s AQI between 6 a.m. on October 20 and 6 a.m. on October 21 ranged from 190 to 332. However, Poovulagin Nanbargal said the actual pollution levels were far higher Read More | Source: The Hindu