B2 2020 Forbes - Kaitlyn

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Across
  1. 3. vital source of warmth
  2. 4. the burning of fossil fuels causes
  3. 5. come from everyday activities
  4. 7. emission source of GH/ atmos. gases
  5. 9. emission source of CO2
  6. 12. what we breathe in
  7. 14. N2O is about ___% of GH gases
  8. 16. 10% of ozone is here
  9. 17. chemical formula is CH4
  10. 18. irregularly change in amount
  11. 19. emission source of methane
  12. 20. hottest layer
  13. 21. CFCs cause ozone layer ___
  14. 22. gases that come from human activity
  15. 24. produced by humans
Down
  1. 1. chemical formula is N2O
  2. 2. meteors burn here
  3. 5. keeps the earth warm
  4. 6. main chunk of atmospheric gases
  5. 8. chemical formula is CO2
  6. 10. ___ produces CH4, oxygen, nitrogen
  7. 11. CO2 is important for ___
  8. 13. methane is about ___% of GH gases
  9. 15. N20 can be used as a dental ___
  10. 23. come from refrigerants