International Ozone Day is observed on ________? A. September 13 B. September 14 C. September 15 D. September 16 Related Read more articles Previous PostWhen World Health Organization (WHO) declared the novel Coronavirus (COVID-19) pandemic __________? Next PostAl Qaeda leader Osama bin Laden was killed by U.S. Special Forces during raid in Abbottabad on____________? If the aforementioned Answer is Wrong. Leave a Reply with an authentic source.Cancel reply
