India, Dec. 29 -- Even as parts of the city remained wrapped in haze on Sunday, the Maharashtra Pollution Control Board (MPCB) and the Brihanmumbai Municipal Corporation (BMC) swung into action to address concerns around worsening air quality and pollution. The MPCB ordered the closure of four ready mix concrete (RMC) plants and collected fines worth Rs.1.87 crore from 37 others, while the BMC inspected major construction sites and reviewed pollution mitigation measures.

"We are reviewing the city's air quality on a daily basis and have formed flying squads to check if establishments are complying with prescribed regulations," said MPCB member secretary M Devender Singh.

Though the city's overall Air Quality Index (AQI) at 4pm on Sunday...