Etymology
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global warming (n.)
by 1983 as the name for a condition of overall rising temperatures on Earth and attendant consequences as a result of human activity. Originally theoretical, popularized as a reality from 1989.
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climate change (n.)

1983, in the modern "human-caused global warming" sense. See climate (n.) + change (n.). Climatic change in a similar sense was in use from 1975.

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