In the worst case of air pollution in the world, an area in Pakistan's Lahore recorded an AQI of nearly 1600 on Friday. According to Swiss monitor IQAir, the CERP Office area in Lahore had an AQI of 1587 on Friday morning.

Delhi is facing a pollution emergency as AQI exceeds 450. New restrictions, including diesel vehicle bans and school closures, are now in effect to combat the worsening air quality.

Delhi recorded the worst air quality in India on Wednesday with a severe AQI of 418 while Noida and Gurugram also faced very poor levels.

Air pollution choking New Delhi has ground outdoor work to a halt and disrupted air travel in the Indian capital.

Delhi and its neighbouring cities are experiencing pollution levels that are at least 30-35 times the safe limit recommended by the World Health Organization (WHO). Every year, Delhi and northern states battle hazardous air during the winter months of October to January due to plummeting temperatures,