Earth's atmosphere

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Across
  1. 5. Gas formed when carbon combines with oxygen 7
  2. 7. Effect that traps heat in the atmosphere 10
  3. 10. Energy from the sun 5
  4. 11. Gas that forms a protective layer in the atmosphere 5
  5. 13. Removal of forests 13
  6. 14. Contamination of the environment 9
  7. 16. Electricity generated from moving water 10
  8. 17. Type of fuel formed from ancient organic matter 6
  9. 19. Short-term atmospheric conditions 7
  10. 20. Increase in Earth's average temperature 7
  11. 22. Pollutants released into the air 9
Down
  1. 1. Measure of heat or cold 11
  2. 2. Energy from Earth's internal heat 10
  3. 3. A potent greenhouse gas from livestock and landfills 7
  4. 4. Type of energy that is naturally replenished 9
  5. 6. Long-term weather patterns in a region 7
  6. 8. Power derived from physical or chemical resources 6
  7. 9. The layer of gases surrounding Earth 10
  8. 12. Air in motion used to generate power 4
  9. 15. A level or stratum of material 5
  10. 17. Materials burned to produce energy 5
  11. 18. Element found in all living things and fossil fuels 6
  12. 21. Substances like CO₂ and CH₄ in the air 5