There is actually a simple solution, which is to put red lights on street lamps instead of white lights. You can buy LEDs which emit only in frequencies that wo

There is actually a simple solution, which is to put red lights on street lamps instead of white lights. You can buy LEDs which emit only in frequencies that won't disturb circadian rhythms. They are a bit more expensive, but I think the reason we don't do this is because planners/governments are probably unaware of the problematic nature of light pollution.