1. Bell Work
What are some examples of energy sources that produce carbon emissions?
What are some ways that North Carolina could get energy from a source that does not produce carbon emissions?

2. Sustainability – Alternate Energy Sources
Unit 7
Sustainability – Alternate Energy Sources

3. Bell Work Describe 1 renewable energy resources
Describe 1 nonrenewable energy resources

4. Electricity One way that we use energy
Electric Grid moves energy from power plants to the electricity outlet
Most power plants get energy from fossil fuels
Alternative energy sources could be used

5. Conventional Energy Resources
Cons
Pros
Fossil Fuels
Coal
Non-renewable,
↑ CO2
Cheap
Petroleum
Natural Gas
Other
Wood
Peat

6. Nuclear Energy
Energy from nuclear fission – Uranium is bombarded with neutrons
Used for ~7% of US energy
Pros:
Small amount of fuel = large amount of energy
No carbon emissions
Cons:
Nonrenewable (Uranium = limited resource)
Produces dangerous radioactive waste
Needs a lot of water to cool
Expensive to build and operate

8. Alternate Energy Resources
Wind: Energy generated by motion of air
Solar: Energy from solar radiation
Hydropower: Energy generated by movement of water
Geothermal: Energy derived from the heat inside the Earth
Tidal Energy: Energy derived from rise and fall of ocean tides and currents

9. Solar Energy Harvested with Solar panels Renewable
Solar Panels can be very expensive to install and maintain
Limited energy when there is no sun light

10. Wind Energy Harvested with wind turbines Renewable
Windmills & wind farms require a lot of land, make noise and can harm birds
Require wind

11. Hydropower
Harvested with dams that divert river water through a turbine
Renewable
Dams can change the flow of water and damage habitats
River sediments can damage the machinery in the dam
Dams are expensive to build

12. Geothermal Harvested by installing pipes that circulate underground
Can be used to power a turbine to create electricity
Renewable and sustainable
Expensive to install
Not useable everywhere with current technologies

13. Tidal Energy Harvested with Barrages (dams), lagoons or tidal streams
Requires large tidal surge
Renewable & sustainable
Can have negative environmental impacts
Not useable everywhere with current technologies

14. Alternate Energy Source Renewable or Nonrenewable?
Advantages
Disadvantages
Renewable or Nonrenewable?
Solar
Nuclear
Wind
Hydroelectric
Geothermal
Tidal

15. Bell Work
Complete the crossword puzzle by matching the following words to the appropriate clue and filling in the spaces in the grid:
Atoms
Greenhouse
Solar
Convert
Hydroelectricity
Sun
Electricity
Nonrenewable
Sustainable
Energy
Panels
Turbine
Fossil
Plants
Water
Gasoline
Recycle
Wind
Geothermal
Renewable

16. Bell Work
Make a table in your notebook comparing and contrasting the pros and cons of nuclear energy and coal
Nuclear Energy
Coal
Pros
Cons

17. - - Removing Carbon from Atmosphere Natural ways :
Trees & other plants
Soil
Oceans
wetlands -
Development
Deforestation
Human Impact

18. Removing Carbon from Atmosphere
Carbon Capture and Storage (CCS): an alternate method to capture and store carbon before it reaches the atmosphere

19. Aquaculture:
The farming for fish, plants, and algae for food or other purposes
Efficient way to provide protein in diets
Allows for local harvesting of seafood

20. Bell Work
You survey 20 people and ask them who they will vote for president.
The results of your survey are:
Cruz 3 (15%)
Clinton 4 (20%)
Sanders 5 (25%)
Trump 8 (40%)
Who will win the election? Can you say for certain who will win? Why or why not?

21. Analysis of Human Impact Survey:
Complete the table to summarize your results
Make a bar graph for EACH question/statement
Write a conclusion that summarizes your data. Be sure to discuss how representative your data is of the wider population in Carrboro, North Carolina, the US and the world.

22. Bell Work
How many planet Earth’s are needed to support your life?

23. Ecological Footprint: A tool for measuring how much productive land & sea is used by an activity or a population. This can be compared to how much is available.
Productive land & sea:
Provides food, fiber, timber, energy, space for buildings and roads.
Absorbs waste products.
Includes cropland, forest and fishing grounds.

24. Global Hectares: a measure of average productivity of all productive land & sea on earth per year
Productive land area
Unproductive land area
Productive water area
Unproductive water area
51 billion hectares of surface on earth.
12 billion hectares are productive.
7 billion people on Earth:
~1.7 hectares/person

25. Ecological Footprint
Tells us if Earth’s resources are sustainable with our current lifestyles
Helps us make decisions to bring human resource consumption in line with available resources on Earth

26. Your Ecological Footprint
Calculate your ecological footprint using the worksheet.
Go to to take a quiz and see how you could change your footprint.

27. Ecological Footprints around the world:
United States: 10 hectares/person
Canada: 9 hectares/person
Italy: 4 hectares/person
Pakistan: <1 hectare/person
If every person on Earth had your ecological footprint, how many Earth’s would it take to support human population?
(Hint: divide your footprint in hectares by 1.7)

28. Bell Work
Get your poster to finish work on your City Building Project.
Due at start of class on Friday:
Visual representation of city
City Report (with table summarizing consumers and producers of energy)