Don’t forget leaded paint. It was also banned in those decades but any house/building from before then is potentially contaminated with lead paint. While interior paint has gotten a lot of attention, “encapsulating” it is not perfect nor permanent and the building is still surrounded by contaminated soil from exterior paint.
And prop planes … leaded fuel not banned yet
The Wikipedia article is pretty scary, especially
According to a study, half of the US population has been exposed to substantially detrimental lead levels in early childhood – mainly from car exhaust whose lead pollution peaked in the 1970s and caused widespread loss in cognitive ability.