I used to fly from St. Louis to Seattle for business and from 30K feet during daylight it was nearly impossible to see evidence that the planet was inhabited at all. Just the occasional railroad or Interstate highway.
Crop circles....
I remember flying in the days before commercial jets and being able to see car headlights at night when we were at altitude. Other than the E-ticket ride at takeoff, that’s what struck me most about jet flight - the cruising altitude.
I remember one book called "The Population Bomb". This guy was so sure that we were doomed. I think he's still around today and now he hangs out with Al Gore.
Anyway, when I was 12 years old, I took my first plane trip. It was 1975. This was a time when people were concerned about all the deforestation and how those evil lumberjacks were cutting down all the trees. So I get a window seat and as soon as we left Boston, I saw nothing but trees all the way to Atlanta with the occasional ribbon of highway or a few squares of farmland.