Abi points to something that gives some knowledge about how to judge the quality of air (if not how to measure it). It says:
Under Environmental Protection Agency guidelines, air with fewer than 15 micrograms per cubic meter is considered good quality; air with more than 251 micrograms per cubic meter is hazardous.
And in one Cigar Show, they found something disturbing:
Mr. Kennedy’s preliminary findings showed that the average level of particulate matter in the hotel [the venue for the cigar show] the day before the event was 8 micrograms per cubic meter, 40 micrograms where he was waiting to get in line for the event and 1,193 micrograms inside the ballroom.
I wonder how much is in Pune and Bangalore’s air. I need to get hold of this meter. 🙂