Final answer:
The United Nations became involved in the protection of the ozone layer through the establishment of the Montreal Protocol in 1987.
Step-by-step explanation:
The statement is TRUE. The United Nations (UN) did become involved in the protection of the ozone layer. Specifically, the UN established the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The protocol aimed to phase out the production and use of certain substances, such as chlorofluorocarbons (CFCs), which were identified as major contributors to ozone depletion.
Learn more about United Nations involvement in ozone layer protection