From wildfire smoke molecules to the coronavirus, this graphic compares the relative size of particles that we, for the most part, can’t see. Read more
This population-weighted cartogram shows the countries with the worst air pollution, based on fine particulate matter (PM2.5) concentration. Read more
Using 2022 average PM2.5 concentrations, we’ve ranked the most polluted cities in the world according to IQAir. Read more
South Asian nations are the global hotspot for pollution. In this graphic, we rank the world’s most polluted countries according to IQAir. Read more
San Bernardino County in California is home to two of the 10 dirtiest cities in the United States: San Bernardino city and Ontario. Read more