Read: Delhi air pollution interrupts play in India vs Sri Lanka Test, visitors wear masks on fieldLevels of ozone and ammonia also fluctuated drastically. It is not just particulates Concentration of choking gases shot up in the national Capital in November Concentration of choking gases shot up in the national Capital in November“NO2 is primarily the result of burning diesel. Sulphur DioxideThe gas, one of the key elements of smog, has dropped well below the safe standards in Delhi primarily because of use of cleaner fuels. Levels of Ammonia also shot up in Delhi on some days but have never crossed the safe standards. This time, we experienced a far better November as far as pollution levels are concerned.

Source: Hindustan Times December 04, 2017 02:46 UTC