1. Alters, Sandra, Energy: Shortage, Glut or Enough? Information Plus Reference Series, 2003
2. Blatt, Harvey, Our Geologic Environment, Prentice Hall, Inc., 1997
3. Alters, Sandra, Energy: Shortage, Glut or Enough? Information Plus Reference Series, 2003
4. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition, 2004. McGraw-Hill Companies, Inc.
5. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition, 2004. McGraw-Hill Companies, Inc.
6. Chandler, Gary, Alternative Energy Sources, Millbrook Press, 1996
7. Blatt, Harvey, Our Geologic Environment, Prentice Hall, Inc., 1997
8. Fay, James A. and Dan S. Golomb, Energy and the Environment, Oxford University Press, New York, 2002
9. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition, 2004. McGraw-Hill Companies, Inc.
10. Langholz, Jeffrey and Kelly Turner, You Can Prevent Global Warming, Andrews McMeel Publishing, Kansas City, 2003
11. Pipkin, Bernard, Geology and the Environment, Fourth Edition, 2005. Thompson Learning, Inc.
12. Blatt, Harvey, Our Geologic Environment, Prentice Hall, Inc., 1997
13. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition , 2004. McGraw-Hill Companies, Inc.
14. http://
15. http://
16. http://
17. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition, 2004. McGraw-Hill Companies, Inc.
18. Boyle, Godfrey, Renewable Energy: Power for a Sustainable Future, Second Edition, 2004, Oxford University Press, New York
19. Cunningham, William, Principles of Environmental Science: Inquiry and Applications, Second Edition, 2004. McGraw-Hill Companies, Inc.