Greenhouse Effect Definition
The warming of a planet's surface and lower atmosphere caused by trapped solar radiation: solar shortwave radiation penetrates to the planet's surface and is reradiated into the atmosphere as infrared waves that are then absorbed by carbon dioxide, water vapor, etc.
Webster's New World
(ecology) (with the) The process by which a planet is warmed by its atmosphere.
The greenhouse effect could lead to global warming or, at least, climate change.
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