Regarding pollution figures for major cities in India I found an interesting link.
Go to
www.ndtv.com. It has the lastest news etc for India pretty much like CNN. On the left side under "Sections" click on pollution. It gives you the readings for most of the major cities including a graph to chart the last ten days. Residents, correct me if I am wrong, but there seems to be a certain time of the year for each city where the pollution levels are worse. i.e Based on March 30th readings Mumbai has low reading--and I know it cant be true always.