The document discusses several alternative energy sources including hydroelectric power, nuclear energy, solar energy, wind energy, and geothermal energy. Hydroelectric power harnesses the kinetic energy of falling or flowing water using dams, and provides around 7% of US energy needs. Nuclear energy currently supplies 17% of the world's electricity through fission in plants, but safety is a concern due to past incidents. Solar energy can be captured passively through building orientation or actively through photovoltaic cells, though efficiency and availability are issues. Wind energy uses turbines to convert kinetic energy of wind into electricity and capacity has been growing, though output is variable. Geothermal energy taps into heat from the Earth's interior through steam or hot

1. Alternative Energy Sources Renewable Sustainable Non-polluting

3. Potential to Kinetic Energy Potential Energy Kinetic Energy

5. Hydroelectric Power Use

8. Nuclear Fission Plants

9. Fission

12. What is Radioactivity

14. Radiation Hazards

16. Half Lives Uranium-238 4 x 10 9 years Thorium - 234 24 days Carbon - 14 5730 years Polonium-214 1.6 x 10 -4 sec Plutonium-239 24,100 years

20. US Fission Reactors

21. Chain Reaction

22. Controlling the Chain Reaction

24. Disposal

25. Yucca Mountain

26. Nuclear Fusion Requires very high tempertures And high pressures

27. Cold Fusion

28. Tokamak

29. The Other Solar Energy

31. Earth’s Revolution

32. Solar Angle

33. Solar Radiation

37. Active Solar Energy

38. Photovoltaic Cells

39. The Cost of Solar Cells

40. Efficiency

43. The Other Solar Energy

47. Extreme Pressure Variation

48. Where is the Wind?

49. Installed Wind Capacity

51. Offshore Wind Capacity

53. The Electricity Grid

57. Heat from the Earth’s Interior

58. Earth’s crust

59. Boundaries and Hot Spots

60. Island Formation

61. Harnessing Steam

62. California’s Resources

64. Iceland

65. Iceland