Earth science

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Across
  1. 2. to keep to something longer
  2. 3. enough
  3. 4. the whole air in the planet
  4. 5. statement or conclusion of some academic stuff
  5. 6. some kinds of lives live in the land
  6. 8. extinction
  7. 9. to replace
  8. 10. decide to do
  9. 13. some very tiny life
  10. 14. the market goal or target
Down
  1. 1. take care of the environment
  2. 5. activated something
  3. 7. to disturb or stop
  4. 11. suffer hunger
  5. 12. die or extinct