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Where does electricity come from?
Power plants. Power plants burn coal, which pollutes the air.
__________ also need the night sky. Some animals use the stars to ___________.
Animals, find their way.
What's the definition of pollution?
Waste that harms nature.
_______ were the first to notice the growing problem of light pollution.
Astronomers
In 1900, there were __________Americans. There are more than ___________ today.
76 million, 300 million.
How is light pollution caused?
By excess light that is beamed into the sky.
What does murky mean?
dull
The power plants release ______________________.
Sulfur dioxide and carbon dioxide.
Light pollution has the worst effect on ________ . Many _________________ and use the stars like street signs to find their way.
Birds, Birds migrate
What does migrate mean?
to move from one place to another
What happened in 1954 at a US Air Force base in Georgia?
A flock of birds followed the spotlights and flew straight into the ground. About 50,000 birds died.
What does endangered mean?
Rare, at risk of dying out.
Light pollution is also bad for other___________. Female sea turtles come _______ at night and lay eggs in the sand.
nocturnal animals, ashore.
What happens to turtle hatchlings because of light pollution?
Light coming from land leads them the wrong way. As a result, the turtles wander into the streets and parking lots and get lost.
What does reduce mean?
to have fewer of something
