the greenhouse effect
noun [ S ]
ENVIRONMENT ukusan increase in the amount of carbon dioxide and other gases in the atmosphere (= mix of gases which surround the earth), which is believed to cause the surface of the earth to become gradually warmer and to be a threat to its future:
They claim that the floods are a result of the greenhouse effect.
As it rots, it releases carbon dioxide and methane, contributing to the greenhouse effect.
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climate change
global warming