Delhi's Pollution

Although Delhi has some green lungs and I always thought that because of that it was less polluted than e.g. Mumbai of Pune.At sunrise there is a thick broad layer of black colored particulates and soot covered by a brownish orange layer of NO2 (Nitrogen Doxide). This morning there was no wind, so this was for sure no dust and what is worse, this was in the early morning after a regular weekend. That means that the pollution did not move over night and keeps the city in his tentacles day and night