Mumbai ranks as the fourth most polluted mega city in the world, according to a recent World Health Organisation or WHO report, released on May 2. Maharashtra government officials however, have downplayed criticism of the city's handling of its pollution problem, saying that Mumbai's air quality was "moderate". The financial capital faces a serious health issue as a result of rapidly deteriorating green cover, rising vehicular emissions and rapid construction. Officials cite the Maharashtra Clear Air Mission 2022, roping in IIT Bombay for consultation and coming up with "a scientific action plan" as steps to combat serious respiratory problems that the city faces.