I mean, compared to when I was a kid in Sacramento our summer skies have been incredibly blue. We use to have really heavy smog here and especially in the last 10 years I’ve really noticed an increase in quality. That said the fires kind of stop some of that progress every now and then.
I wonder if the increase of quality is due to more evs and vehicles being less environmentally friendly. With better efficiency and filters and regulations that help with that.
It’s definitely more related to the Cali blend of gas and the focus on vehicle efficient and smog here. People hate on CARB but it has actively made our skies clearer and better.