Only Australia, Estonia, Finland, Grenada, Iceland, Mauritius and New Zealand met WHO's standards in 2023.
The IQAir report was based on data from more than 30,000 monitoring stations in 134 countries and territories.
Chad, the world's most polluted country in 2022, was left out of the 2023 list due to data issues. Iran and Sudan were also removed from the 2023 list.
Christa Hasenkopf, director of the Air Quality of Life Index at the Energy Policy Institute at the University of Chicago, said 39 percent of countries have no public air quality monitoring.
He said, “Considering the large potential benefits and relatively low costs, it is surprising that we do not have an organized global effort to deploy resources to close these data gaps, especially in places where air The health burden of pollution is the greatest.”
