Dhaka, the overcrowded capital city of Bangladesh, has topped the list of cities with the worst air quality with an AQI index of 257 at 9:31am today (25 January). The air was classified as 'very ...
Erin Davis/Axios Visuals Air quality is worsening in the Upper Midwest and Northern California, according to year-over-year data. Why it matters: Poor air quality can lead to long-term health problems ...