The Ozone Layer

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Across
  1. 4. The number of different types of UV Radiation
  2. 6. Kind of radiation is filtered by the Ozone Layer
  3. 7. The final step(s) in a radical substitution
  4. 9. A household use for CFCs
  5. 11. Which element's radicals break down Ozone?
  6. 12. A suggested alternative to CFCs
  7. 15. The repeated step(s) in a radical substitution
  8. 16. The part of the atmosphere which contains the Ozone Layer
  9. 17. The state at which the production of Ozone is with Oxygen Molecules
  10. 19. The element that makes up Ozone
  11. 20. A species with an unpaired electron
Down
  1. 1. The unit used to measure Ozone Concentration
  2. 2. First country to ban CFCs
  3. 3. What does CFC stand for?
  4. 5. What does SPF stand for?
  5. 8. The number of countries signed up to the first protocol to control global emissions of CFCs
  6. 10. The first step of a radical substitution
  7. 13. Type of UV radiation, with the smallest wavelength, completely blocked by the Ozone Layer
  8. 14. Radical produced from lightning, contributes to destruction of the Ozone Layer
  9. 18. The protocol to control global emissions of CFCs