This is what its like at this time of year in India, all over India! Its smog. Kolkata and Delhi get the worst of it , I suspect the main reason for this is the humans.
Walking outside this morning to sit and drink my coffee and read the local rags , of course you have to content with the air. We have lived in many countries with smog and dirty air we are used to this. The one difference is the smell in India.
The air smells of burning plastics and rubber products, with the hint of burnt wood . Wood I like the smell of, but the plastics is a little bit much. Add to it the high sulphur diesel thats used in all the cars and trucks and we have a lot of smog when the high pressure systems are over India….sad.