A Windmill is a rather simple machine powered by wind energy. The windmill uses wind to turn rotating blades. These rotating blades effectively turn wind energy into usable energy such as electricity and, in earlier times, energy to pump water and grind grain.
While many of today's windmills are extremely high tech, made from special composite, lightweight materials and include high-tech turbines, a standard windmill such as the ones that were created centuries ago can be constructed with simple tools, materials and know-how.
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