My dad lived on Green Mountain in the 70s. From his backyard deck the view of smog was amazing, it actually had a copper color.
I remember those days. Also recall flying into LAX in the early 70s and the air was like coffee. I remember thinking to myself, “what is it going to look like in 20 years if it looks like this now?” Fortunately, both LA and Denver look better now than they did then.