Air glow

[exeexe]

You have my permission to include airglow into the game.

What is airglow? I didnt really care enough to get an explanation but an example of it looks like this

And you can only see it when you are in class 1 (maybe class 2 too) of the Bortle scale - that is when you have no light pollution. Its the right and green stuff on the image.  So i think its reasonable to imagine being in Canada far away from everything during a disaster that hit all electricity that you can see airglow

[Fuarian]

That's a long exposure photograph.