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Question

What is the purpose of greenhouse gases?

A
They keep the Earth cold.
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B
They reflect the harmful UV rays from reaching the surface.
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C
They keep the Earth warm.
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D
They radiate radio waves.
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Solution

The correct option is C They keep the Earth warm.
The Earth's surface temperature could be as cold as 18C without the greenhouse gases. The greenhouse gases trap heat from the Sun and radiate within the layer, making life sustainable on the planet.

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