Wind Power : Wind Power How it works: Wind Power How it works: The wind blows the propeller round, which turns a generator to produce electricity.: How it works : The wind blows the propeller round, which turns a generator to produce electricity. Slide 3: Many turbines built on the same location is called a “Wind Farm”. More turbines create more wind, thus creating more energy. Slide 4: The first windmills in Europe appear in sources dating to the twelfth century. Slide 5: The first windmill for electricity production was built on July 1887 by James Blyth . Blyth's 33-foot high-wind turbine was installed in the garden of his holiday cottage. And was used to charge accumulators, developed to power the lighting in the cottage, thus making it the first house ever to have electricity supplied by wind power. Slide 6: Advantages Wind is free and renewable source. It does not cause green house gases or other pollutants They do not utilize a great deal of space, even though they are tall. They are useful for remote places that cannot receive electricity from the power grid. They come in a different range of sizes, so can be used by homes and small businesses. A 100 MW wind farm, over the course of its 20-year lifetime, has the capacity to generate an amount of electricity that would require approximately 2.9 million tons of coal .: A 100 MW wind farm, over the course of its 20-year lifetime, has the capacity to generate an amount of electricity that would require approximately 2.9 million tons of coal . Slide 8: Disadvantages Slide 9: Wind turbines rely on the wind, less wind means less electricity. Many people think that they make the countryside look unnatural. The process of manufacturing and transporting the turbines may cause land pollution. When built on shore they can spoil coastline areas and tidal flow patterns, affecting the habitats of marine life and birds.