International Day for the Preservation of the Ozone Layer 2020
United Nations General Assembly celebrated International Day for the Preservation of the Ozone Layer on September 16 each year for the Preservation of the Ozone Layer. This designation had been made on December 19, 2000, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the Ozone […]
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