Agra topped the global pollution ranking as 24 Indian cities recorded AQI readings above 300. What is driving the deterioration in air quality?

India's air pollution crisis extends beyond Delhi, with cities across several states appearing near the top of a global real-time ranking.

India placed 13 cities among the world's 20 most polluted urban centres, while Delhi remained outside the list. The real-time ranking underlined sharp variations in air quality across cities and hours.