<rolls eyes>
The problem was re-framed because western industry mostly stopped belching obvious pollution and that framing of the problem did not resonate with western voters who could see that the rivers and sky were cleaner than they'd ever been. It used to be that smog was a feature of weekly weather in urban areas and if your dog jumped in a river 50mi downstream of a textile factory you'd know what color they were making the day before. By the 90s that kind of stuff was cleaned up a ton.
Not everything you don't like is the result of the evil other guys.