Why is light pollution an issue?

Jasmine Chen

4/12/2026

Light pollution is excessive or misdirected artificial light produced by human activities. This has become a growing problem around the world. While outdoor lighting is useful for modern life, providing safety and aesthetics, too much of it disrupts the natural balance of nature.

Many animals rely on darkness for behaviors like hunting, sleeping, and migration. Artificial light at night can confuse animals, causing birds to fly off course or collide with buildings, and leading sea turtle hatchlings away from the ocean. Insects are also affected, as they are drawn to lights and often die, which disrupts entire food chains.

Plants and animals depend on natural light cycles for reproduction and growth, but artificial lighting interferes with this. Scientists have found that over 160 species are affected by light pollution. When these natural systems are disrupted, it can impact entire ecosystems and biodiversity.

In addition, light pollution affects humans. It can interfere with our circadian rhythm, making it harder to sleep and potentially leading to health problems. It also reduces our ability to see the night sky, blocking views of stars and planets and taking away an important cultural and scientific experience.

More resources:

https://www.nps.gov/subjects/nightskies/lightpollution.htm

https://darksky.org/resources/what-is-light-pollution/effects/wildlife-ecosystems/

https://education.nationalgeographic.org/resource/light-pollution/