1. Renewable Energy Advantages and Disadvantages

2. Alligators in Idaho

3. Tectonic Plates

4. Geothermal Energy

5. Tectonic Plates

6. Reykjavik, Iceland

7. Geothermal Energy Disadvantages: Only possible in “hot spots”

8. Geothermal Energy Advantages: Little release of carbon dioxide No release of nitrogen or sulfur oxides No smog renewable

9. Hydropower Advantages: No release of carbon dioxide No release of nitrogen or sulfur oxides Renewable

11. Hydropower Disadvantages: Disrupts ecosystem Young fish swimming downstream get chopped up in turbine Spawning fish blocked from spawning ground upstream

12. Wind power Advantages: No nitrogen oxides or sulfur oxides No carbon dioxide released No smog renewable

13. Wind power Disadvantages: Danger to migratory birds Ruins “view shed” Noisy May hurt property values

14. Biomass Advantages: Both a source and “sink” of carbon dioxide Renewable energy

15. Biomass Disadvantages: Time and land required to grow crops- $ Not as much thermal energy released per unit mass as fossil fuels

16. Solar Power Advantages: Renewable No release of carbon dioxide No release of sulfur or nitrogen oxides No smog

17. Solar Power Disadvantages: PV cells are expensive PV cells are inefficient in generating electricity