Author: Emily Su; Sources: National Geographic, Science Buddies, Globe at Night, Unsplash

Light Pollution

INTRODUCTION

Light pollution is the overuse of artificial lights or unwanted light. The three types of light pollution are glare, skyglow, light trespass, and clutter.

“People all over the world are living under the nighttime glow of artificial light, and it is causing big problems for humans, wildlife, and the environment.” — National Geographic

ACTIVITY 1

Constellation Activity (By EPA)

Materials: flashlight, black construction paper, pencil/needle/pin, tape, scissors // Duration: 10-15 minutes

  • Cut a piece of construction paper slightly larger than the front of your flashlight

  • Poke holes in the construction paper to form a "constellation

  • Tape the piece of construction paper to the front of your flashlight

  • Take your flashlight into a completely dark room

  • Turn your flashlight on and aim it at the ceiling

  • Afterwards, try to gradually brighten the room. For example, open a single window blind partway, or turn a dimmer switch up a little bit.

  • Aim your flashlight at the ceiling again

LESSON

Light pollution can be reduced by using light only when it is needed. Light pollution can disrupt ecosystems, wildlife, and lead to health effects on humans (Globe at Night).

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Ecological Succession