‘Ozone Day’ is observed on— ('ओजोन दिवस' मनाया जाता है-)

Question: - ‘Ozone Day’ is observed on— ('ओजोन दिवस' मनाया जाता है-)

September, 16 (सितंबर, 16)

Question: - ‘Ozone Day’ is observed on— ('ओजोन दिवस' मनाया जाता है-)