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Supertopics:
Ozone Layer Depletion (The Ozone Hole)

Particular Ozone Layer Holes

Subtopics:
The Antarctic Ozone Hole
the Antarctic ozone hole remains large
webJohn VidalThe Guardian2014-10-31
ozone hole to recover later than expected
webScienceDaily2006-06-30
The Arctic Ozone Hole
arctic ozone layer thinnest ever recorded
webPaul BrownThe Guardian2005-04-27