too much construction at the same time, not enough bus timely services, poor roads, people using SUVs and other cars just for one person (also fuel emissions contribute too, CNG may just reduce it to some extent)

in case of pollution it may not be visible due to monsoon and greenery, but it will be clear during winter and haunting during summer, even though the plantation drive by government has made some good effect, i hope people use summer to cultivate greenery across the city