Among the capital cities of 134 countries and regions analyzed in the 2023 World Air Quality Report published by air purification equipment manufacturer IQAir, New Delhi ranked first with an average annual PM2.5 concentration of 92.7 micrograms per cubic meter of air. As Statista's Florian Zandt reports, this number exceeds the most recent World Health Organization goal 17 times, and only one other capital city comes close in IQAir's ranking. You will find more infographics at Statista Dhaka, the capital of Bangladesh, exhibited an annual average…
