Human Intervention in environment

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Across
  1. 3. empty
  2. 6. Bacterial infection of the lungs
  3. 8. to break up, disturb
  4. 9. A term that typically describes a species that no longer has any known living individuals.
  5. 10. A biological community of interacting organisms and their physical environment.
  6. 11. pertaining to respiration
  7. 12. all the plants and trees in an area
  8. 13. episodes of breathing difficulty due to narrowed or obstructed airways
  9. 14. great damage or ruin
Down
  1. 1. not wanted
  2. 2. inflammation of the bronchial tubes
  3. 4. the action or fact of treating something unfairly in order to benefit from them
  4. 5. A gradual increase in average global temperature
  5. 7. diseases illnesses that are easily passed from one person to another