Guwahati, March 11 -- A new report released on Tuesday, March 11, 2025, shows that thirteen out of the world's top 20 most polluted cities are in India, with Byrnihat in Assam being the most polluted city globally.

The World Air Quality Report 2024, by Swiss air quality technology company IQAir, reveals that Delhi remains the most polluted capital city in the world. India is now the fifth most polluted country, down from third place in 2023.

The report notes that India's air quality improved slightly in 2024, with a 7% drop in PM2.5 concentrations (from 54.4 to 50.6 micrograms per cubic meter). However, India still contributes to a large portion of global pollution.

Byrnihat, a town located between Assam and Meghalaya, is especially af...