But USA is also failing, Los Angeles was the city with most dense pollution.

https://www.forbes.com/sites/jamesconca/2018/08/23/the-ten-most-polluted-cities-on-earth/

"Los Angeles is the most toxic city in America, the tenth in the world, with the 7th highest PM10 air pollution levels at 57 PM10, and a light pollution score of 10,900 μcd/m2. Chicago and New York ranked in 21st and 26th place, respectively."

And I think things went worse in 2023.

Ok, I found this: https://www.iqair.com/world-air-quality-ranking
Seem China still on all top.