This city of Pakistan has earned the title of the world's most polluted city, with an Air Quality Index (AQI) of 394.

Delhi's air quality worsens, with AQI at 385, prompting implementation of GRAP-II to combat pollution effectively.

Delhi's air quality is expected to deteriorate further, with the AQI likely to exceed 400 and fall into the 'severe' category on Tuesday and Wednesday, due to stubble burning in neighbouring states and unfavourable wind conditions.

Vehicular emissions top cause of air pollution, but stubble burning in neighbouring states aggravates the situation

National capital's average air quality on Monday slipped into the 'very poor' category for the first time in the season, as the residents of the city woke up to a hazy morning with smog also visible at some places.