Come on MAN!
Seriously, back in the 1970s and previously we had some major pollution problems. I grew up south of Buffalo. Lake Erie was a sewer. The Niagara River was disgusting from the chemicals pouring into it. In Niagara Falls, NY there was a subdivision and school built on top of a land fill called Love Canal. Where they has buried hundreds of 55 gallon drums of chemicals. The river in Cleveland caught on fire several times in the 1960s.
Even the autos we drove put out tons of pollution. For example, one of the guys in my office has a 1964 Corvette. All original. He pulled in the parking lot next to me last week. I could not believe how much his car STANK.
Most of what you described was industrial pollution.....and I suspect that had far more impact on the environment than cars.
Also, the left can outlaw every ICE car in the country, put us all in mud huts and allow transportation by horse only and it won’t ever offset the pollution being spewed into the atmosphere by Russia, China and North Korea.......they couldn’t give 2 shits about the environment.....which means all this green bs is nothing more than an excuse for the left to eat away at our freedoms........THAT is what it’s really about. CONTROL and COMPLIANCE.