“The Central Pollution Control Board (CPCB)’s latest report on air and noise pollution over the years during Diwali in India spells bad news for Delhi.

Most of Delhi had noise and air pollution problems even on ‘normal days’ but it was seen to spike on Diwali, especially last year.” Hindustan Times
Read it on Delhiair.org:
Diwali pollution in Delhi getting worse over years, says report