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How do greenhouse gases affect Earth?

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Greenhouse gases are transparent to incoming (short-wave) radiation from the sun but block infrared (long-wave) radiation from leaving the earth's atmosphere. This greenhouse effect traps radiation from the sun and warms the planet's surface.
User Serge Weinstock
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Answer:

They stop heat from escaping the atmosphere.

Step-by-step explanation:

User Moilejter
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