So I never like to be one who presents a problem without presenting a solution. Regarding light pollution, there are some easy solutions.
The easiest solution, by far, is to just turn off lights you are not using, or if you live in an area where you need to be concerned about your safety or the safety of your livestock, install a motion detector, which turns your lights on only when something moves. (How much outdoor lights actually deter predators and criminals is a subject that is up for debate, but I'm going to leave that be for now.)
Adding motion detectors to your lights assures you that when all is calm, as the song goes, all does NOT necessarily have to be bright. (A little Christmas humor for ya)
Modifying existing lighting so that there are baffles on it or moving toward lighting that has more recessed receptacles allows more light to reach the ground and less to shoot off in the direction of the sky.
All these ideas, if used widely, could do a great deal to ensure more of us grow up seeing a night sky that at least partially resembles what our ancestors saw when they looked up at night. It's a legacy worth preserving.