By:Harsh Shah

David FontanaDan LeonardBobby Gylling

Earliest use in sail boats First windmills used for:

Grain-grindingWater pumping

Vertical Windmill Made in Persia 500-600 A.D.

Modern Windmill Steel blade 6 Million installed First one for electricity

Requirements Turbine Generator 10 mi/h winds

Types Offshore Onshore Near-shore

$8000-$1,500,000 Pays for itself over time Funded by Government or Investors Depends on distance to city Subsidies – tax cuts

30¢ per kilowatt-hour in 1980 5¢ per kilowatt-hour today 80% decrease Continue to decrease

Larger and more plants Technological advances

Theoretical Potential Output Satisfy energy need 5 times Satisfy electrical need 35 times

Actual Predictions Only 20% captured

Requires 13% global land Distance barriers

Least polluting alternative fuel Clean fuel

No Fuel No Emissions Land is only resource

Indirectly reduces emissions

Wild birds are endangered Noise pollution

Interfere with TV signals Interfere with sea animals

Visual effect

http://youtube.com/watch?v=nt3mGDZmdYQ