Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the report, IQAir said.

All but one of the world’s top 20 most polluted cities last year were in Asia, a new study shows. The majority of these ...

Chad, in central Africa, is the world’s most polluted country, while California has the worst air pollution in North America, ...

India was the fifth most polluted country globally in 2024, with Byrnihat in Meghalaya being the most polluted metropolitan ...

The majority of the world is breathing in dirty air, according to the latest air quality report. So where does the U.S. rank?

Experts said the real amount of air pollution might be far greater as many parts of the world lack the monitoring needed for more accurate data.