B1 2020 Sankolli

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Across
  1. 1. Is 21% of greenhouse gasses on Earth and caused by photosynthesis
  2. 3. Process of cutting down trees for urbanization or agriculture but as a result more carbon dioxide is produced
  3. 4. Dangerous rays released by the sun
  4. 9. Produced through agricultural processes, livestock, and manure
  5. 10. Is 1% of greenhouse gasses in Earth
  6. 11. The outer most layer which has lightest atmospheric gases such as hydrogen and helium
  7. 13. A substance that contaminates the air such as fossil fuels
  8. 16. The layer that has the Ozone layers which protects us from ultraviolet rays
  9. 17. Are gasses either then nitrogen, oxygen, and carbondioxide
  10. 18. Pose no threat to the environment
  11. 22. Where weather occurs and lowest layer
  12. 23. Is 78% of greenhouse gasses on Earth
  13. 24. The average climate of the entire Earth
  14. 25. Is caused by factories from oil,coal and natural gas
Down
  1. 2. When more greenhouse gasses get trapped in the atmosphere causing drastic changes in the climate
  2. 5. Ionized layer of Earths atmosphere
  3. 6. The layer that includes a large part of the ionosphere
  4. 7. Directly above stratosphere and is the coldest layer in the atmosphere
  5. 8. The gasses in the atmosphere that absorb radiation
  6. 12. Caused by heat evaporating water into the air
  7. 14. thin layer that exists in the stratosphere which absorbs ultraviolet rays
  8. 15. Generally emitted from factories through fossil fuel combustion
  9. 19. Is a naturally occurring hydrocarbon gas mixture that consists primarily of methane
  10. 20. A mixture of gasses that surround the Earth
  11. 21. Man made greenhouse gas