[DoughtyOne]

Agreed.

Here in SoCal we have the San Gabriel mountain range.

It can effectively block bad smog from being disbursed.

If we get an on shore flow breeze, it blows the smog inland
and it can get trapped by the mountains, making it terrible.

Still, it doesn’t compare to the 70s. And the inversion
layer is a big deal. It can really trap ‘the stuff’ in.

[ifinnegan]

Yep. It used to be we couldn’t see the mountains from a few miles away.