Twenty Questions and Answers About the Ozone Layer: 2018 Update |
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Introduction |
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Q1: What is ozone, how is it formed, and where is it in the atmosphere? |
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Q2: Why do we care about atmospheric ozone? |
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Q3: How is total ozone distributed over the globe? |
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Q4: How is ozone measured in the atmosphere? |
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Q5: How do emissions of halogen source gases lead to stratospheric ozone depletion? |
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Q6: What emissions from human activities lead to ozone depletion? |
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Q7: What are the reactive halogen gases that destroy stratospheric ozone? |
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Q8: What are the chlorine and bromine reactions that destroy stratospheric ozone? |
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Q9: Why has an "ozone hole" appeared over Antarctica when ozone-depleting substances are present throughout the stratosphere? |
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Q10: How severe is the depletion of the Antarctic ozone layer? |
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Q11: Is there depletion of the Arctic ozone layer? |
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Q12: How large is the depletion of the global ozone layer? |
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Q13: Do changes in the Sun and volcanic eruptions affect the ozone layer? |
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Q14: Are there controls on the production of ozone-depleting substances? |
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Q15: Has the Montreal Protocol been successful in reducing ozone-depleting substances in the atmosphere? |
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Q16: Does depletion of the ozone layer increase ground-level ultraviolet radiation? |
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Q17: Is depletion of the ozone layer the principal cause of climate change? |
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Q18: Are Montreal Protocol controls of ozone-depleting substances also helping protect Earth's climate? |
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Q19: How has the protection of climate by the Montreal Protocol expanded beyond the regulation of ozone-depleting substances? |
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Q20: How is ozone expected to change in the coming decades? |
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Appendix: Terminology |
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Appendix: Acknowledgements |
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