The world's worst cities for air pollution

Although many spots around our globe saw significant air quality improvements during the pandemic, many cities worldwide are still struggling with air pollution. To depict the effects and quantity of polluted air present in the world’s cities, the World Health Organization (WHO) has released its guidelines on the amount of PM2.5 (fine particles) a city should have in its air. Combining WHO’s guidelines with IQAIR’s World Air Quality Report 2021, HouseFresh has created an interactive map illustrating which towns and cities have the worst air pollution in the world.