1. How do we use energy in our lives?
1. Electricity
2. Heat
3. Transportation

2. Where does most of the energy we use come from?
Burning fossil fuels such as coal, natural gas, or oil

3. Where do we get fossil fuels?
Coal
Mined from below the surface of the earth

4. Natural Gas
Trapped in rocks deep underground, must be drilled and then sent through pipelines
Highly explosive!

5. OIL
Drilled for mostly in oceans or areas of land that used to be oceans

6. How do fossil fuels produce electricity?
1.  Coal, natural gas, or oil is
burned to heat water that makes
steam
2. Steam turns large turbine
3. Turbine spins the generator
4. Produces electricity

7. So what’s the problem? 1. Fossil fuels are nonrenewable.
2. When fossil fuels are burned they produce CO2. CO2 is the gas that is highly responsible for global warming.

8. What is global warming?
Global warming is an increase in the average temperature of the earth's atmosphere

9. Causes
Global warming is caused by an increase in “greenhouse gases” that trap the sun’s heat in the atmosphere.

11. What are the consequences of Global Warming?
1. Temperatures will rise, disrupting fragile ecosystems
2. Glacier sea ice will melt
3. Melting ice will cause massive flooding of low lying areas (Michigan will be underwater!)

12. Consequences continued
4. Sensitive habitats and species will become extinct
5. Extremes in temperatures will include droughts, excessive rain, and violent storms
6. Economies will be disrupted

13. So if burning fossil fuels is so harmful, what are the alternatives?
Non-renewable resource
Nuclear Power and Hydrogen Fuel Cell
Renewable Resources
Wind, Solar, Water, Geothermal, and Biomass

14. Nuclear Power
Uses mined Uranium-235

15. U-235 is split to release it’s energy, this heats the water…makes the steam…turns the turbine…

16. Nuclear Power Pros Cons Efficient
Lots of power for small amount of material
No GHG emissions
US has a lot of it
Nobody wants it near them
Accidents can/have occurred
Non-renewable
Waste disposal problems
Expensive to build/ maintain

17. Hydrogen Fuel Cells Uses Hydrogen and oxygen
H and O move across hydrogen fuel cells (like a film) produces energy like a battery

18. Hydrogen Fuel Cells Cons Fuel is Efficient
Pros
Cons
Fuel is Efficient
NO Harmful waste – water and heat are by-products
Expensive
No infrastructure
Hard to transport – explosive
Energy input > energy output

19. Hydropower
Using the natural force of
water and gravity

20. How hydropower works

21. Hydropower Pros Cons No emissions We have the technology Efficient
Makes a lot of power
Disrupts aquatic ecosystems
Expensive to build/maintain dams
Can’t be put everywhere

22. Solar Power Energy generated from the heat or light from the sun
Uses photovoltaic cells to turn electromagnetic energy into electrical energy

25. Solar Energy No waste No GHG emissions Renewable
Pros
Cons
No waste
No GHG emissions
Renewable
Can be used by individuals
High up front cost to install
Need space to keep solar panels
Not effective everywhere
Costly to fix

26. Wind Power Air moves around the earth
Wind is used to spin turbines that turn the generators that generate electricity

27. Wind Power

28. Wind Power Pros Cons No emissions Good for Michigan economy
Takes up space
Noise pollution
Kills birds
Accidents happen frequently
Limited locations

29. Geothermal Energy
geothermal energy is the natural heat of the earth that is conducted to the earth's surface through volcanoes and hot springs.

30. Geothermal
In certain parts of the world, heat from the Earth can be used to produce steam to power turbines and heat homes.

31. Geothermal Energy Pros Cons No Emissions
We have the technology to use it
Can be used for heat and electricity
Expensive
Not available everywhere
Can cause earthquakes

32. FlexFuel Biomass Ethanol
energy produced from organic matter by converting the complex carbohydrates in organic matter into energy
-Biomass
Ethanol
FlexFuel

33. Biomass
Burned to create heat that is used in electrical generation

34. Biomass Pros Cons Renewable Cheap Readily available
Multiple crops can be used
Carbon Neutral?
Replaces food crops for fuel crops
Can cause environmental damage in farming process

35. So where are we now with our energy use?