1. Warm-up
What is the difference between a renewable and a non renewable resources?
What is an example of a nonrenewable resource?
What is an example of a renewable resource?

2. Oil Refined into many different energy products
gasoline, diesel fuel, jet fuel, heating oil
If consumption increases and no new sources are found, oil supplies may be exhausted in another 30 years or so
Over 50 percent of the world's oil is found in the Middle East
Over 70 percent of oil fields are near tectonic plate boundaries

3. Oil Pollution Limited supplies Relatively inexpensive fuel source
Pros
Cons
Pollution
Limited supplies
Relatively inexpensive fuel source
Same amount of oil creates more energy than coal
Burns cleaner - 50 percent less sulfur dioxide than coal

4. Natural Gas Natural gas is a mixture of gases
Mostly methane, some ethane, propane, and butane
Estimate of natural gas reserves is about 100 million metric tons
At current usage, this supply will last an estimated 100 years
Propane and butane are removed from the natural gas and made into liquefied petroleum gas (LPG)
Most is found in Eastern Europe and the Middle East

5. Natural Gas Pollution Cleanest burning fossil fuel Limited supplies
Pros
Cons
Pollution
Limited supplies
Cleanest burning fossil fuel
Easy and inexpensive to transport once pipelines are in place

7. Renewable Energy Sources
Solar photovoltaics
Solar thermal power
Passive solar air and water heating
Wind
Hydropower
Biomass
Ocean energy
Geothermal
Waste to Energy

8. Solar Power Advantages Hot water heating Efficient Cost-effective
Pays off in 5-7 years
Sometimes less reliable
Not effective in all climates

9. Solar Power Photovoltaic Cells Inefficient, Expensive
Require batteries to store energy
Variable quality of electricity
Manufacturing is energy intensive and creates chemical and solid waste

10. Wind Efficient Noisy Unsightly
Requires large amount of space for large-scale applications

11. Geothermal
Uses Earth’s internal heat to produce steam (which turns turbines to generate electricity)
Efficient
Depends on regional geology
Cost efficiency
Longevity

12. Tidal Inefficient Limited to few geographic locations
Low environmental impact

13. Hydroelectric Power

14. What is hydroelectric power
Running water moves turbines
Spinning of turbines produces electricity
Usually involves building a dam on a river to control water flow

15. Advantages of hydroelectric power
Renewable
No carbon dioxide emissions
Non-polluting
Powered by rivers, which flow because of gravity pulling water down hill

16. Disadvantages
Dams prevent fish and other river life from swimming upstream to spawn
Dams trap sediment, creating erosion problems downstream
Flooding behind dams displaces people and wildlife
Dams create an artificial lake in which stratifies
warm, oxygen-rich water on top
cold, oxygen-poor water on bottom
Water released is either too warm or does not have enough oxygen for downstream organisms

17. Exit Ticket How can solar panel farms harm the environment?
Will we ever run out of oil reserves? If so, how soon.