Dhaka, the overcrowded capital city of Bangladesh, ranked first on the list of cities with the worst air quality with an AQI score of 241 at 9am on Wednesday. Its air was classified as very unhealthy, ...

Cities in California made up six of the 10 cities with the worst air quality, including the three worst. People of color were disproportionately exposed to air pollution: The report found 63% of ...