3. How many sources of energy do you see?

4. Solar Wind Hydro Nuclear Tides Waves Fossil Fuels Biomass Geothermal

7. SourceProsCons Sun  free source  unlimited  env. friendly  not efficient  expensive set-up

8. SourceProsCons Natural heat coming from the Earth  free source  unlimited  env. friendly  expensive set-up  few locations

9. SourceProsCons Burning natural products or waste  free source  env. friendly  gets rid of waste  environment  better use of natural products?

10. SourceProsCons Moving river water  cheap source  env. friendly  recreation  flooding impacts  expensive set-up

11. SourceProsCons Ocean waves  free source  unlimited  navigation safety  eyesore

12. SourceProsCons Rising and falling water  free source  unlimited  two-way  only 25 locations  navigation safety  eyesore

13. SourceProsCons Moving air  free source  env. friendly  expensive set-up  eyesore, birds  inconsistent source

14. SourceProsCons Atom splitting  not expensive source  lots of source  safety concerns  expensive set-up  weapons possible

15. SourceProsCons Burning of coal, oil, or natural gas  not expensive source or set-up  readily available  environment  not renewable