I remember in the 60's and 70's that summer weather reports always included a statement on temperature inversions. The inversions kept the smog low to the earth. I used to see brown clouds floating at several hundred feet from the fossil fuel plants around Boston. That's all gone now. The air is clean, No more reports about temperature inversions.
Now that the sunlight gets through, the we should feel warmer. Maybe the global warming fanatics could change black rubber roofs to white. And, paint the roads white to boot. With our cleaner air, we have a greater need to reflect light back to the heavens. Either that or bring back light blocking sooty smog.
One of the reasons the air is now clean is that legislation was passed requiring industrial enterprises to clean up their emissions. That legislation was opposed by many who did not want to accept the connection between human activity and environmental consequences.