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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de facto 

Latin, literally "in fact, in reality," thus, "existing, but not necessarily legally ordained or morally right;" from facto, ablative of factum "deed, act" (see de +  fact).

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