Natural resources & Coal

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Across
  1. 1. The fuel which is formed from dead living organisms
  2. 4. The natural resource which deplete after sometime.
  3. 6. The resource which either derived from nature or made in laboratory
  4. 8. The process of conversion of organic matter into coal.
  5. 9. The factor responsible for carbonisation.
  6. 10. An example of exhaustible natural resource.
Down
  1. 2. The natural resource which does not deplete.
  2. 3. An example of inexhaustible natural resource.
  3. 5. The high pressure gas formed after burning coal.
  4. 7. The resource which is present in nature and used as it is.