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How long has ozone depletion been occurring?

April 26, 2017ozone depletion

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How long has ozone depletion been occurring?

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Based on data collected since the 1950’s, scientists have determined that ozone levels were relatively stable until the late 1970’s. Severe depletion over the Antarctic has been occurring since 1979 and a general downturn in global ozone levels has been observed since the early 1980’s.