by Agafaster:
all it takes is the use of a shield on top of street lights to prevent the light escaping upwards
A lot of cars from Jaguar and BMW are now appearing with head up displays and night vision panels on the windscreens (windshields). This may reduce the need for car headlights and even streetlights in rural areas in the future.
I believe super efficient reflectors and LED technology will reduce the light polution levels, whether this benefit will be undone by more industry taking advantage who knows.
I suppose fog is the main problem on an island like Great Britain. Today for example was warm and it generated high humidity which blocks a clear sky (in the night this mist reflects the light).
Another downside to light pollution is human and animal health. Light triggers the endocrine system and can affect sleep, growth, mental health etc.
