powerpoint presentationsustainabledevelopment.un.org/content/documents/3746degraaf.pdf · 200 150...
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- PowerPoint Presentationsustainabledevelopment.un.org/content/documents/3746degraaf.pdf · 200 150 100 1995 Cycle 24 Sunspot Number Prediction (2013/05) 2020 2000 2005 2010 2015 Hathaway/NASA/MSFC
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