environmental science

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Across
  1. 2. the average height of a ____ when mature is 87.6
  2. 3. what layer of the atmosphere absorbs almost all of the sun's harmful ultraviolet light?
  3. 7. when we have a common resource and use it to each individual's maximum
  4. 8. excessive richness of nutrients in a lake or body of water due to runoff from the land which causes dense growth of plant and animal life due to the lack of oxygen
  5. 9. a cost of burden that is shifted to a outside person or group
  6. 13. clean water found in spaces
  7. 16. waste is burned to generate electricity
  8. 17. able to harm at a low level
  9. 20. a distinct group of individuals
  10. 22. a area of land that drains the streams and rainfall to a common outlet
  11. 23. process of change in a species structure of ecological community
  12. 24. the study of harmful effects of any material on organisms
  13. 26. the particulates that are most harmful are
  14. 27. used to clean up toxic waste dumps
  15. 28. the _____ helps prevent future "Love Canal" disasters, tracking down the waste and makes sure it is properly disposed of
  16. 29. _____ is not yet gone, but may be lost in near future
Down
  1. 1. variety of life in the world
  2. 2. which layer of the atmosphere has most of the weather?
  3. 4. removal of soil causes ___ to increase
  4. 5. the study of how diseases are spread
  5. 6. what act sets the national standards for safe drinking water
  6. 10. when some chemicals get concentrated up the food chain
  7. 11. ph lower than 5
  8. 12. air pollution that reduces visibility
  9. 14. what layer does soil have the most life and roots?
  10. 15. identify and trace source of pollution
  11. 18. best management practice to reduce runoff
  12. 19. makes the dirt rich when decomposed
  13. 21. which layer of the atmosphere has the ozone layer?
  14. 25. the spaces in the ground that can hold water between soil particles