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The Largest Hole Ever Observed In The Ozone Layer Over The Arctic Has Closed. The Hole, Observed In Late March 2020, Is Thought To Have Been Created By The Unusual Cold Temperature Over The Arctic. And The Closure Has Nothing To Do With COVID-19 Air Pollution Reduction, But Is Due To A 20ºC Higher That Normal Temperature.

Largest-ever hole in the ozone layer above Arctic finally closes | Euronews

https://www.euronews.com/2020/04/24/largest-ever-hole-in-the-ozone-layer-above-arctic-finally-closes

A record-size hole in the #ozone layer above the Arctic has finally closed.