1. How can changing a light bulb reduce greenhouse gases?

2. It takes energy to get energy Before it’s useful… Oil must be  1.Found 2.Pumped 3.Transported 4.Refined 5.Transported 6.burned

3. Net energy Total useful energy available from the resource over its lifetime minus the amount of energy used and wasted Example: – 10 units of energy in oil in ground – Use 8 units to find, extract, process, transport – 2 units of net energy available

4. Energy is needed to make electricity Where does the supply of electrons come from? http://www.youtube.com/watch?v=HPyClNtyF Os http://www.youtube.com/watch?v=HPyClNtyF Os

5. Magnets & Generators http://www.metacafe.com/watch/912594/simple_electric_generator/ 1.Energy sources (like coal) are burned 2.Boils water, which produces steam 3.The steam spins a turbine 4.The turbine spins a magnet 5.The magnet creates a flow of electrons 6.This flow of electrons travels from the power plant to your home!

8. Evaluating Energy Resources U.S. has 4.6% of world population; uses 24% of the world’s energy; – 84% from nonrenewable fossil fuels (oil, coal, & natural gas); – 7% from nuclear power; – 9% from renewable sources (hydropower, geothermal, solar, biomass).

10. Analyze the figure What is the primary energy source for all of our transportation? What is the largest end use consumer of U.S. energy? What is the largest primary energy source used? What is the second largest primary energy source? What is the smallest utilized primary energy source and what is it used for? What primary energy source powers all sectors of end use? What is coal used to power? Where does industry draw its power from? What is nuclear power used for? What is the only end use item that has one primary energy source?

11. How can changing a light bulb reduce greenhouse gases?

12. CFL – compact fluorescent lightbulb CFLIncandescent life span: 10,000 hours1,500 hours Watts:6014 Over the course of 30 years, having CFL lightbulbs in your house can save you around $20,000!

13. Two sides to everything.

14. What is our best immediate energy option? 1. Cut out unnecessary energy waste by improving energy efficiency 2. Transition to renewable resources – Sun, wind, flowing water, biomass, geothermal, hydrogen gas 3. Burn more coal & synthetic gas/liquids 4. Natural gas 5. Nuclear power

15. No matter what our decision… Ask: How much will be available in the next 15 years? the next 30 years? longterm? What is the source’s net energy yield? How much will it cost to develop, phase in, and use this energy resource? How will extracting, transporting, and using the energy resource affect the environment? Can this energy source help us sustain the earth?

16. Did you beat Mrs. Loch? You analyzed your (presumed) usage of electricity – That energy is secondary Primary Energy Resources: The fossil fuels(oil, gas, and coal), nuclear energy, falling water, geothermal, and solar energy. Secondary Energy Resources: Those sources which are derived from primary resources such as electricity, fuels from coal, (synthetic natural gas and synthetic gasoline), as well as alcohol fuels.