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

2. US Energy Production & Consumption

3. Energy Security?

4. US Energy Production & Consumption 100 Quadrillion BTU

5. How many Big Macs is that? 576 kilocalories (w/o cheese) 43 trillion That’s a lot

6. Day Two: Energy & the Environment

7. Fuzzy Schedule for Today Energy Overview  Now with 100% more Schoolhouse Rock! Bedroom Exercise (~9:15)  Exciting, but not nearly as exciting as it sounds Energy and electricity (~10:15) Energy and transportation (~11) Lunch (~11:15) Field trip (~noon) Field trip debriefing (~12:45) Alternative fuels (~1:15) Wrap-up (~2:00)

8. Why is energy important? Imagine life without it Impacts the economy, our society and the environment Lots of green design and environmental engineers study it

9. How do we measure it? Fundamental energy unit: joule  Also BTU, Calorie  1 J =.00095 BTU =.00024 Calories Used over time (power): joule per second, or watt  Also horsepower  1 J/s = 1 W =.0013 HP 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)

10. Where do we get it? Fossil fuels  Coal, natural gas, petroleum Petroleum  Heating oil, gasoline, diesel, propane Renewable Sources  Hydro, wind, solar, geothermal Nuclear Biomass (wood, dried plants)

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