HUMAN IMPACT ON THE ATMOSPHERE

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Across
  1. 2. One of the three types of fossil fuels
  2. 3. Forms 78% of the atmosphere
  3. 4. One of the main components of fossil fuel
  4. 6. One of the layers of the atmosphere
  5. 8. Layer that protects us from harmful ultraviolet lights
  6. 11. Alternative type for green energy
  7. 12. One of the reasons that fossil fuels are used
Down
  1. 1. Consequence of toxic chemicals and particles entering the atmosphere
  2. 4. One of the human causes of air pollution
  3. 5. Thin layer of gasses that surrounds the Earth
  4. 7. Can reduce pollution
  5. 9. One of the natural causes of air pollution
  6. 10. Type of greenhouse gas