Claim: September 16 was designated on December 19, 2000 by the United Nations General Assembly (one of the three principal organs of the United Nations serving as the main deliberative, policy-making, and representative organ of the UN) as the International Day for the Preservation of the Ozone Layer.
Evidence: The United Nations General Assembly (UNGA or GA; French: Assemblée générale, AG) is one of the six principal organs of the United Nations (UN), serving as the main deliberative, policy-making, and representative organ of the UN.