2. When is the International Day for the Preservation of the Ozone Layer, recognized by the UN observed? A.11 December B.16 September C.8 March D.9 August
Option B Solution: In 1994, the United Nations General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date of the signing, in 1987, of the Montreal Protocol on Substances that Deplete the Ozone Layer.
