“NEW DELHI: The annual average PM2.5 concentration in Delhi is typically more than 10 times the US National Ambient Air Quality Standard of 12 micrograms per cubic metres. Such poor air quality has significant economic and health impacts (e.g., heart attack, asthma, lung cancer, mortality) and India needs to initiate PM 2.5 speciation and epidemiological studies to control sources effectively-this was the outcome of four workshops held in Delhi, Chandigarh, Jaipur and Lucknow last year by Indian  ..” Economic Times

Read it on Delhiair.org:
Delhi doesn’t come close to meeting US pollution standards on  most days