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Ozone Layer Depletion (The Ozone Hole)
Ozone Layer Depletion Miscellay
Documents:
lower stratosphere ozone is still declining
web
Ethan Siegel
Forbes
2018-02-06
new ozone-depleting chemicals discovered in atmosphere
web
Laura Poppick
LiveScience
2014-03-09
ozone layer is somewhat improved
web
Stuart Fox
LiveScience
2010-05-06