1. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy
Yesterday, Today, and Tomorrow
Gateway – Energy and the Environment
© 2011 Project Lead The Way, Inc.

2. Sustainable Energy
Meets the needs of the present without compromising the ability of future generations to meet their needs
Includes renewable and inexhaustible energy sources
Hydroelectric, solar, wind, wave and tidal power, geothermal and biomass

3. Yesterday – Burning Wood
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Yesterday – Burning Wood
Heat
Light
Cooking

4. Yesterday – Fossil Fuels
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Yesterday – Fossil Fuels
Coal, oil, and natural gas formed from plants and animals that lived up to 300 million years ago.
Fossil fuels are found in deposits beneath the Earth’s surface.
Fossil fuels are an exhaustible energy source because it takes millions of years for them to form.
In the 19th century we started to extract and use fossil fuels for energy.

5. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy Today
84% of U.S. energy consumption is still fossil fuels.
25% of U.S. energy needs are imported.
57% of the petroleum used in the U.S. is imported.
What sources are changing?
Annual Energy Outlook 2014
Energy Information Administration
Official Energy Statistics from the U.S. Government
Which energy source shows the same percentage of use over the 5-year period? What does that mean?
How has the percentage of renewable sources changed?
How has the percentage of fossil fuels changed?
U.S. Energy Information Administration, Monthly energy Review, Table 1.3 and 10.1 (May 2014), 2013 data
U.S. Energy Information Administration, Monthly energy Review, Table 1.3 and 10.1 (May 2014), 2013 data

6. Renewable Energy Today
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Renewable Energy Today
The 10% of renewable energy used in the United States is divided into 5 sources as shown below.
These sources are sustainable and include both renewable and inexhaustible sources.
Which category increased the most between 2008 and 2013?
Annual Energy Outlook 2014
Energy Information Administration
Official Energy Statistics from the U.S. Government
This slide shows which renewable or inexhaustible sources are used. So of the 10% of energy supplied by renewable energy, about half of that uses biomass as a source. Only 2% of the energy created from renewable or inexhaustible sources is derived from geothermal sources.
How has the distribution of renewable/inexhaustible energy sources changed over the five year period from 2008 to 2013?
Have you seen evidence of the increase in the use of wind power?
U.S. Energy Information Administration, Monthly energy Review, Table 1.3 and 10.1 (May 2014), 2013 data
U.S. Energy Information Administration, Monthly energy Review, Table 1.3 and 10.1 (May 2014), 2013 data

7. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
How is Energy used?
How does the United States use energy differently than the world?
Why do you think the United States uses more energy for transportation?
Annual Energy Outlook 2014
Energy Information Administration
Official Energy Statistics from the U.S. Government
U.S. Energy Information Administration, Monthly energy Review, Table 1.3 and 10.1 (May 2014), 2013 data
How much energy is consumed in the world by each sector? (2014, May 19).
Retrieved December 16, 2014, from

8. Energy in the Future – Petroleum
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy in the Future – Petroleum
At current levels of consumption, the world’s oil reserves are expected to last about years.
There may be some oil that is currently undetected, but it cannot be economically extracted with current technology.
Institution of Mechanical Engineers
When will oil run out? (n.d.). Retrieved December 16, 2014, from

9. Energy in the Future – Natural Gas
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy in the Future – Natural Gas
Known gas reserves are expected to last about 60 years at current consumption levels with current technology.

10. Energy in the Future – Coal
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy in the Future – Coal
If we continue to use coal at the current consumption rate, we expect to run out in about 200 years.

11. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Energy in the Future
We are using fossil fuels that were made more than 300 million years ago.
They are not renewable; they can’t really be made again.
We can save fossil fuels by
Conserving energy
Using alternative energy sources

12. Alternative Energy – Future
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Alternative Energy – Future
More money and research will go into developing alternative energy sources.
Nuclear
Non-renewable
potential energy stored in the nucleus of an atom
Biomass
Renewable
stored chemical energy from wood, garbage, and agricultural wastes
Hydropower
Inexhaustible
gravitational energy of moving water
Wind
Inexhaustible
kinetic energy from moving air

13. Alternative Energy – Future
Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Alternative Energy – Future
Solar
Inexhaustible
radiant energy from the sun
Geothermal
Inexhaustible
heat energy from beneath the Earth’s surface
Many career opportunities will involve research and development of alternative energy sources.

14. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
Smart Grid - Future
Smart Grid technology changes the way we manage and distribute energy by making our current power grid more intelligent.
A Smart grid delivers electricity from suppliers to consumers using digital technology to save energy, reduce cost and increase reliability.
Smart Grid
Smart Grid for Intelligent Energy Use
Smart Grid hyperlink – make sure you’re connected to the Internet and you have the sound on. It takes awhile for each slide of the story to come up. Use this time to discuss the topic… for example, what is CO2 emissions? There are three topics that should be covered: alternative energy, smart meters and CO2 emissions.
Smart Grid for Intelligent Energy Use – approximately eight minute video from You Tube

15. Energy: Yesterday, Today and Tomorrow
PLTW Gateway
Unit 3 – Lesson 3.2 – Solving the Energy Crisis
References
Microsoft, Inc. (2009). Clip art. Retrieved April 10, 2009, from
U.S. Energy Information Administration, Annual Energy Outlook 2014, December 16, 2014
When will oil run out? (n.d.). Retrieved December 16, 2014, from