Question

______ appears due to thinning ozone layer every year over Antarctica during the month of August- September.

Answer 1

Ozone layer:

1. The ozone layer is a part of Earth's Stratosphere present between $20-26$km above sea level.
2. It mostly contains a large number of ozone molecules$\left({\mathrm{O}}_3\right)$ along with other gases in the Stratosphere.
3. The ozone layer absorbs most of the harmful ultraviolet rays coming from the sun and prevents them from reaching the Earth.
4. The gases such as${\mathrm{CH}}_4$ chlorofluorocarbons$\left(\mathrm{CFCs}\right)$, and, ${\mathrm{N}}_2\mathrm{O}$ escape into the Stratosphere and cause damage to the ozone layer.

Final answer: Ozone hole appears due to thinning ozone layer every year over Antarctica during the month of August- September.