The Disappearance of Our Night Sky

Light pollution, a growing concern over the last two centuries, disrupts the natural cycle of day and night that has governed life on Earth for billions of years. As cities increasingly illuminate the night with unnecessary artificial light—from streetlights to billboards—this phenomenon has detrimental effects on wildlife, ecosystems, and human health. Studies reveal that light pollution not only wastes an estimated $3.3 billion annually in the U.S. but also releases millions of tons of carbon dioxide, contributing to climate change. Furthermore, it interferes with the natural production of melatonin in humans, increasing risks of sleep disorders, depression, and various diseases. wildlife, particularly migratory birds, suffer as artificial light disorients them, leading to fatal collisions and disrupted breeding patterns. As we lose our connection to the natural night sky, organizations like the International Dark-Sky Association advocate for light pollution mitigation to preserve this universal heritage and its benefits for both humans and nature.

The Disappearance of Our Night Sky

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