India, Oct. 21 -- Delhi remained shrouded in a thick layer of smog on Tuesday, a day after Diwali, even as the city's Air Quality Index remained in the 'very poor' category.

The national capital saw a marginal rise in pollution levels on Tuesday, with the AQI at 351, marginally up from 345, on the day of Diwali, the daily bulletin of the Central Pollution Control Board showed.

The city celebrated the Festival of Light with green fireworks, a departure from previous years, coupled with poor meteorological conditions. Stubble burning has also started in neighbouring states, worsening the air conditions in the capital.

Of the total 38 monitoring stations in the city, 35 were in the 'red zone', indicating 'very poor' to 'severe' air qualit...