India, Dec. 6 -- Delhi's air quality was recorded in the upper end of the "very poor category" on Sunday and is likely to improve over the next two days due to a predicted increase in the wind speed, the India Meteorological Department (IMD) said. The air quality had turned severe on Saturday with slow wind speed allowing the accumulation of locally-generated pollutants, according to the weather bureau.

Delhi's air quality index (AQI) was 394 at 9am on Sunday. The 24-hour average was 404 on Saturday, which falls in the severe category. It was 382 on Friday, 341 on Thursday, 373 on Wednesday, 367 on Tuesday, 318 on Monday and 268 on Sunday. Air pollution in the neighbouring cities of Ghaziabad (AQI 430), Greater Noida (404) and Noida (404...