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File:Figu readers questions answered 9 EN.pdf (401 KB) - 15:14, 4 June 2020
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File:WMO-Scientific-Assessment-of-Ozone-Depletion-2006-20-Questions.pdf World Meteorological Organization, Twenty Questions And Answers About The Ozone Layer: 2006 Update(1.67 MB) - 01:50, 8 May 2011