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?

Sustainability – Alternate Energy Sources Unit 7 Sustainability – Alternate Energy Sources

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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?

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.

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

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.

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

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

Your Ecological Footprint Calculate your ecological footprint using the worksheet. Go to http://www.earthday.org/take-action/footprint-calculator/ to take a quiz and see how you could change your footprint.

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)

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)