Category: Causes of light pollution | DarkSky International

Into the blue: Understanding marine light pollution

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Artificial light at night (ALAN) has long been studied for its impacts on humans and wildlife on land…

June 6, 2025

Building dark sky connections with Michelle Wooten

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When you first enter the Smithsonian National Museum of Natural History, most people’s attention is drawn to the elephant …

March 12, 2025

Savannah Pobre at Lights Out Exhibition

Exploring “Lights Out”: The Smithsonian’s special exhibit on reclaiming the night

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When you first enter the Smithsonian National Museum of Natural History, most people’s attention is drawn to the elephant …

January 17, 2025

Fireflies across a backdrop of star trails.

Reflecting on Under One Sky 2024: A global gathering to protect the night

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Under One Sky 2024 was our largest and most impactful global conference to date!

November 21, 2024

Causes of light pollution

Causes of light pollution

Light pollution is a problem, but there’s no single country, group, or industry to blame. Instead, it’s a result …

July 31, 2023

What is light pollution?

Causes of light pollution

Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. When we over-light, fail to …

October 4, 2024

A mountain lion at night, with the city lights of Los Angeles in the background.

Light pollution harms wildlife and ecosystems

Causes of light pollution

For billions of years, all life has relied on Earth’s predictable rhythm of day and night. It’s encoded in …

November 13, 2023