“Starry skies are a vanishing treasure because light pollution is washing away our view of the cosmos. It not only threatens astronomy but also disrupts wildlife, and affects human health. The glows over cities and towns — seen so clearly from space — are testament to the billions of dollars spent in wasted energy by lighting up the sky.”(1)
Whether you are concerned about light pollution or have been adversely affected by it, or just want to learn more about the issue, check out this film produced by the International Dark Sky Association and Loch Ness Productions. It does a masterful job of introducing you to the issue of light pollution and its effects upon human health, wildlife and ecosystems, and wasteful energy consumption.
Sustainable Ewing Green Team 
Interesting post. I posted recently on a similar topic
http://thesciencegeek.org/2015/10/24/dark-skies/
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