Bhubaneswar: Air quality in Bhubaneswar deteriorated sharply on Diwali Sunday, with the Air Quality Index (AQI) crossing the 1,000 mark to reach 1,091 at 9 pm, according to data available on AQI.in. The platform categorised the city’s air quality as “hazardous”. The alarming reading came as Delhi, which has been grappling with severe air pollution,.