Living Organism and structures

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Across
  1. 1. used too much
  2. 3. slowly come to an end
  3. 10. able to be maintained at a certain rate or level
  4. 13. The development of industries for the machine production of goods.
  5. 14. lack of balance
  6. 17. big populations
  7. 19. widely
  8. 20. materials found in the earth that people need and value
Down
  1. 2. The sum of your surroundings
  2. 4. Release of harmful materials into the environment
  3. 5. to lower , decrease
  4. 6. city or town
  5. 7. animals that live naturally in an area
  6. 8. related to farming
  7. 9. a naturally occurring, solid that has a crystal structure
  8. 11. Movement of people from rural areas to cities
  9. 12. Destruction of forests
  10. 15. planting trees
  11. 16. worldwide
  12. 18. not managed properly