BPSC (Bihar PCS) 2025 · Question 96 of 145
Environment
International Day for the Preservation of the Ozone Layer (commonly called World Ozone Day) is observed on 16th September each year. It marks the signing of the Montreal Protocol (1987), an international treaty aimed at phasing out ozone-depleting substances (like CFCs).
Source: 71st BPSC CCE Prelims 2025 (Set H)
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