99% of humanity breathes air laced with soot, sulphur & other toxic chemicals.

Low- and middle-income countries suffer the highest exposures.

Our air is a common good. Let’s clean it up, protect our health & leave a healthy planet for generations to come.#WorldCleanAirDay pic.twitter.com/yoUsnYvs6z

— António Guterres (@antonioguterres) September 6, 2023