1. I. Introduction A. Gaia Hypothesis BioGeoChemical Cycles B. Organic (nutrient) Cycling

2. 1. Process

3. 2. Uses & Influences

7. 3. Losses a. Bound into plants b. Removed by water c. Lost by fire d. Moved by man e. ??????

8. B. Carbon dioxide (CO 2 ) Cycling

9. 1. Process

10. 1. Process

11. 2. Uses & Influences

12. 3. Losses a. Bound into plants b. Bound in ice c. Moved by man e. ?????? d. Bound in shells, bones, etc.

13. D. Nitrogen (N2) (N2) Cycling

14. 1. Process

15. 2. Uses & Influences

16. 3. Losses a. Bound into plants b. Bound to other atoms c. Moved by man d. ??????

17. E. Phosphorus (PO 2 ) Cycling

18. 1. Process

19. 2. Uses & Influences

20. 3. Losses a. Bound into plants b. Bound to other atoms c. Moved by man e. ?????? d. Lost to the abyss

21. F. Sulfur (SO 4 ) Cycling

22. 1. Process

23. 2. Uses & Influences

24. 3. Losses a. Bound into plants b. Lost to abyss c. Moved by man d. ??????

25. II. Human Interactions A. Air Pollution/Global Warming

28. B. Acid Rain

31. C. Ozone Depletion

33. That’s all folks!!!!!!!! Journeys thought out are usually the most rewarding.