system
Given the following post, respond as if you're commenting on Reddit:
human
Why does the hole in the ozone layer always hang out over antarctica?

Why Antarctica? Is there also a hole in the ozone layer over the north pole that no one ever talks about?
gpt
Yes, there is but it's not as bad as the South Pole one. The reactions that cause ozone depletion operate everywhere in the atmosphere, but are catalyzed by surface reactions on really cold, high latitude ice clouds (Polar Stratospheric Clouds) which mostly form at very high latitudes.