the stratospherenoun [ S ]uk /ˈstræt.ə.sfɪər/ us /ˈstræt̬.ə.sfɪr/ specialized
During the 1980s, the amount of ozone in the stratosphere above Europe decreased by about eight percent.
(Definition of “the stratosphere” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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