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The nature of a greenhouse gas is to pass [[visible light]], i.e., incoming energy from the sun, but to be opaque to the [[infrared]], i.e., heat energy being re-radiated outward from the earth's surface. This functions much like the [[glass]] on a [[man-made]] [[greenhouse]], and serves to trap warmth at the surface and in the lower [[atmosphere]].
The nature of a greenhouse gas is to pass [[visible light]], i.e., incoming energy from the sun, but to be opaque to the [[infrared]], i.e., heat energy being re-radiated outward from the earth's surface. This functions much like the [[glass]] on a [[man-made]] [[greenhouse]], and serves to trap warmth at the surface and in the lower [[atmosphere]].
Some extent of greenhouse gases are necessary to maintain life at a livable temperature on Earth.
==References==
==References==