A new report reveals the alarming levels of air pollution in the world's capital cities, with New Delhi topping the list with hazardous PM2.5 concentrations.
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.
The first capital city not located in Asia or Africa on the list is Sarajevo with 28.6 micrograms. IQAir's World Air Quality Report analyzed data from 7,812 air quality monitor stations and sensors, adding seven new African and four new Latin American countries to its covered area compared to its 2022 edition. The biggest share of PM2.5, which stands for ambient particular matter with a diameter of less than 2.
PM2.5 New Delhi Dhaka Air Quality World Air Quality Report WHO Air Quality Guidelines Most Polluted Cities Capital Cities Environmental Health
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