[drewda]

That's exactly why the Bay Area Air Quality Management District exists (established decades before the federal EPA):

> Charged with regulating stationary sources of air pollution emissions, the Air District drafted its first two regulations in the 1950s: Regulation 1, which banned open burning at dumps and wrecking yards, and Regulation 2, which established controls on dust, droplets, and combustion gases from certain industrial sources.

> Much research and discussion went into the shaping of Regulation 2, but there was no doubt about the need for it. During a fact-finding visit to one particular facility, Air District engineers discovered that filters were used over air in-take vents to protect the plant's machinery from its own corrosive emissions! This much-debated regulation was finally adopted in 1960.

https://www.baaqmd.gov/en/about-the-air-district/history-of-...

[lokar]

Yep. And it's why it's hard to paint cars in the Bay Area, but you can do it in less populated areas with better average air quality.