18-Sep-2025 Theme: 'Ozone'

(1) When is the International Day for the Preservation of the Ozone Layer (World Ozone Day) celebrated each year? (a) 16 September (b) 17 September (c) 18 September (d) 19 September.

Answer: September 16, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer.

(2) Do volcanic eruptions affect the ozone layer?

Answer: Yes, Explosive volcanic eruptions inject sulfur gases directly into the stratosphere, causing new sulfate aerosol particles to be produced.

(3) How old is the Ozone Layer?

Answer: Approximately 500 million years old.

(4) Which popular band covered Ace Frehley's "Ozone" on their album released in 2000?

Answer: The Foo Fighters.

(5) The ozone layer is how far above the Earth's surface?

Answer: 15-30km.

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