2. Recap from last time Environmental impacts hard to nail down Energy & electricity a big deal!

3. Energy Production & Consumption in the United States

4. Energy Security?

5. US Energy Production & Consumption 100 Quadrillion BTU

6. How many Big Macs is that? 6 43 trillion That’s a lot

7. Day Two: Energy & the Environment

8. Fuzzy Schedule for Today Energy Overview  Now with 100% more Schoolhouse Rock! Bedroom Exercise (~10:00) Where does electricity come from? ** Field Trip (~11:15)  Energy and Transportation Lunch (~12:30) Field trip debriefing Alternative Fuels * Wrap-up (~2:00)

9. Energy Overview Imagine life without it Impacts the economy, our society and the environment Lots of green design and environmental engineers study it

10. How do we measure it? Fundamental energy unit: joule  Also BTU, calorie Used over time: joule per second, or watt  Also horsepower Use a watt for 3600 seconds: watt-hour Electricity measured (and billed): kilowatt-hour (kWh)  1000 watt-hours Light bulb uses 60 watts: what would meter read after one day?  1.44 kWh (60 watt x 24 hours / 1000)

11. Where do we get it? Fossil fuels  Coal, natural gas, petroleum Petroleum  Heating oil, gasoline, diesel, propane Renewable Sources  Hydro, wind, solar, geothermal Nuclear Wood

12. Where do we use it? Today we’ll look at both transportation and electricity…