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International Day for the Preservation of the Ozone Layer

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File:Ozone over southern hemisphere Sep11 1957-2001.gif

September 16 was designated by the United Nations General Assembly as the International Day for the Preservation of the Ozone Layer.

This designation was made on December 19, 1994, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer.

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