Conservation of Living Things

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Across
  1. 2. protecting and preserving the environment
  2. 3. no longer exists
  3. 6. species not from the area
  4. 7. small numbers may become extinct
  5. 8. extinct species
  6. 10. to protect and preserve
  7. 11. removal of trees and no replanting
Down
  1. 1. mating in a zoo or wildlife preserve
  2. 4. place where organism lives
  3. 5. degredation of the land
  4. 9. release of harmful materials into environment