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Current ozone hole could be one of the smallest in 30 years ...
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The Ozone Hole: Closing the Gap
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Ozone Hole is Big, But Tempered by CFC Reductions
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Ozone depletion - Wikipedia
Sudden stratospheric warming is the unusual climate variation ...
What ever happened to the ozone hole? | NIWA
The Antarctic ozone hole is the smallest since it was discovered - CNN
Ozone Layer Recovery Is Being Undermined by U.S. Pollution
Ozone hole
