https://www.nytimes.com/2014/01/21/world/asia/china-also-exports-pollution-to-western-us-study-finds.html
China smog has even made the liberal press here.
At least one smog day a year in LA is blamed on the Chinese.
I know. However, they will still insist that china is environmentally smarter. It comes from the liberal delusion of “communism = good”.