Is light putting our health and wildlife at risk? Light revolutionized our lives, as artificial illumination is expanding globally the impact of disappearing darkness becomes more and more visible. Ever since the light bulb's invention 150 years ago, artificial light has illuminated homes, streets, and skies but with some unintended consequences. Learn about the major types of light pollution, their impact on human health, and how the worldwide glow from artificial light may continue to grow.

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