Many scientists talk about the Ozone hole, but what is it and why it occurs? The ozone hole is a large decline in ozone mainly appearing over the Antarctic in winter on the Southern Hemisphere.
In the Southern Winter, a polar vortex around the Antarctica is created, which means strong winds around the continent. The winds are so strong and persistent, that they practically block every particle that tries to go North or South. Ozone needs sunlight to be created (most creation is around the Equator) so in the Antarctic during the polar night is only destroyed.
This mechanism causes appearing of the Ozone hole every year. The polar vortex collapses in Spring and therefore the Ozone hole is closing for the Summer.
Let’s hope the Ozone hole will fully recover in 2060s (in Spring 2030s) as the last WMO report claims.