NATURAL GAS

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Across
  1. 5. An energy source that can be easily and most of the time quickly replaced over time.
  2. 7. A primary component of natural gas.
  3. 8. The process of converting natural gas into a liquid.
  4. 10. An energy source that cannot be easily replaced once depleted or gone.
Down
  1. 1. Something that can be caused by natural gas that harms the environment.
  2. 2. A property of natural gas.
  3. 3. The process of burning natural gas.
  4. 4. Deposits of natural gas people know about.
  5. 6. Method used to extract natural gas from underground.
  6. 9. The visible burning of excess natural gas.