Earth's resources

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Across
  1. 2. the process of breaking rocks down
  2. 4. something that satisfies a particular purpose
  3. 8. layer of gases above earths surface
Down
  1. 1. substances found in rocks
  2. 3. fuel obtainedfrom plants, agriculture
  3. 5. the removal of sediments
  4. 6. a form of mining which uses waterand chemicals
  5. 7. decaying plants and animals and their waste