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Light Pollution
Light Pollution

Light Pollution

Light pollution, also known as photopollution, is the presence of anthropogenic light in the night environment.

  • Artificial Lights Disrupt the World’s Ecosystems. Nocturnal animals sleep during the day and are active at night. Light pollution radically alters their nighttime environment by turning night into day.
  • Light pollution interferes with our ability to study the sky, the sky does not glow as brightly at night as it does during the day, but the increase in sky glow caused by cities is enough to make it difficult to see dim objects in the sky.
  • Research suggests that artificial light at night can negatively affect human health, increasing risks for obesity, depression, sleep disorders, diabetes, breast cancer and more.

The four components of light pollution are often combined and may overlap:

  • Urban Sky Glow — the brightening of the night sky over inhabited areas.
  • Light Trespass — light falling where it is not intended, wanted or needed.
  • Glare — excessive brightness which causes visual discomfort. High levels of glare can decrease visibility.
  • Glare — excessive brightness which causes visual discomfort. High levels of glare can decrease visibility.

Read the article Light pollution—what is it and why is it important to know?

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