Whatever the causes of the smog, by one ranking Delhi was not just the most polluted city in the world, but “nearly five times as bad as the second most polluted city, Dhaka,” in Bangladesh next door, as Shashi Tharoor, a leader of the opposition in Parliament and best-selling author, posted on X.

India's capital city of Delhi has virtually shut down as air pollution hit "severe plus" levels, according to Indian government officials in its pollution control authority.

Kanchipuram, often called the "City of a Thousand Temples," has one of the lowest air quality index in the country. Explore countless shrines and intricate 1,000-pillared halls, and immerse yourself in its heritage by discovering its vibrant silk textiles.

Delhi recorded air pollution more than 17 times above an acceptable level as worsening smog triggered curbs on trucking and shuttered construction sites and schools.

New Delhi was the most polluted city in the world for the second consecutive day on Tuesday, wrapped in a dense and toxic smog – mixture of fog and pollution – raising air pollution to levels over 60 times considered safe by the World Health Organization (WHO).

Air quality in northern India has worsened over the past week, with New Delhi's AQI recording a reading of 465, classified as "severe plus category", on Sunday evening due to unfavourable meteorological conditions,

Delhi's new action plan to combat rising pollution includes a ban on non-essential trucks, school closures, and remote work.