1. + Wind Energy Caitlin Reidy

2. + How WIND TURBINES Work Similar to a hydroelectric generator Wind current spins rotor of a turbine Rotor drives shaft of generator Generator produces electricity Can be a few feet – hundreds of feet in diameter

3. + Economics 2.5-5.5 cents per kilo-watt hour: price expected to keep dropping as technology improves Cost-competitive to fuel sources Least expensive of renewable sources Building + Producing leads to a wide variety of jobs Unaffected by international conflicts Pays for itself in 3-8 years, lasts for up to 40

4. + Environmental Benefits Renewable – does not exhaust other natural resources Does not emit pollutants that are believed to be the cause of global warming when used Energy needed to build a turbine is renewed in a matter of months One wind turbine = 2,000 tons of carbon dioxide displaced per year (equivalent of 1 sq. mile of forest) ^also the equivalent of: Recycling 4,500 glass jars Recycling 6,900 aluminum cans = Recycling 1,150 lbs of steel

5. + Potential Fastest growing renewable energy source – over a decade Annual growth rate >20% 2008: US increased generating capacity by over 50% Can power 7 million households in US, right now Potential to provide up to 10,777 kWh annually, 2x as much generated today

6. + Video Clip http://www.youtube.com/watch?v=tsZITSeQFR0

7. + *Points of Interest Reliability? Unsightly? Noisy? Kills Birds?

8. + Numbers 1.2 to 2.6 million, per MW of capacity Smaller turbines: 3-5 thousand per kilowatt of capcity 10 kilowatt (average house) would cost approx.$35,000 8 wind turbines: 6 months to asseble Typically lasts 30 years, with some replacements

9. + Credits http://www.scientificamerican.com/media/gallery/C651137E- 9CD0-7A28-6FB054DBFF592EBC_3.jpg http://www.scientificamerican.com/media/gallery/C651137E- 9CD0-7A28-6FB054DBFF592EBC_3.jpg http://www.mywindpowersystem.com/2009/07/land-for-wind- farms-have-you-got-land/ http://www.mywindpowersystem.com/2009/07/land-for-wind- farms-have-you-got-land/ http://2.bp.blogspot.com/_JdFs87ua_1s/SI6AUswPhlI/AAAAAA AAE70/YU4JFpT_Drw/s400/windmill+farm.jpg http://2.bp.blogspot.com/_JdFs87ua_1s/SI6AUswPhlI/AAAAAA AAE70/YU4JFpT_Drw/s400/windmill+farm.jpg http://www.mywindpowersystem.com/marketplace/wp- content/uploads/2009/11/GE-2_5MW-Wind-Turbine.jpg http://www.mywindpowersystem.com/marketplace/wp- content/uploads/2009/11/GE-2_5MW-Wind-Turbine.jpg http://www.nrgsystems.com/AboutWind/HowtheWindCreatesEle ctricity.aspx http://www.nrgsystems.com/AboutWind/HowtheWindCreatesEle ctricity.aspx http://www.alternative-energy-resources.net/disadvantages-of- wind-energy.html http://www.alternative-energy-resources.net/disadvantages-of- wind-energy.html http://wind- turbine.tripod.com/sitebuildercontent/sitebuilderpictures/phk_ee _re_001502-3.jpg http://wind- turbine.tripod.com/sitebuildercontent/sitebuilderpictures/phk_ee _re_001502-3.jpg

10. + Credits http://www.copper.org/environment/green/casestudies/wind _energy_myth/images/chart.gif http://www.copper.org/environment/green/casestudies/wind _energy_myth/images/chart.gif http://www.windenergyplanning.com/wordpress/wp- content/uploads/2009/01/wind-turbine-noise.jpg http://www.windenergyplanning.com/wordpress/wp- content/uploads/2009/01/wind-turbine-noise.jpg http://www.china-mike.com/wp- content/uploads/2011/03/economist-global-wind-power- chart.gif http://www.china-mike.com/wp- content/uploads/2011/03/economist-global-wind-power- chart.gif http://www.copper.org/environment/green/casestudies/wind _energy_myth/images/chart.gif http://www.copper.org/environment/green/casestudies/wind _energy_myth/images/chart.gif