Over the last few days, Delhiites are having a tough time breathing. With thick smog in the air, the Capital has practically converted to a gas chamber. On Monday, however, there was a slight improvement in pollution levels with the Air Quality Index (AQI) dipping from 'severe' to 'unhealthy'. People are facing trouble breathing. India Today Data Intelligence Unit (DIU) analyzed the AQI bulletin provided by the Central Pollution Control Board. Know what is your city's AQI. Watch this video.