Wind turbines provide a clean energy source, use little water, emitting no greenhouse gases and no waste products during operation. Wind turbine uses the renewable energy from wind to operate. Over 1,400 tonnes (1,500 short tons) of carbon dioxide per year can be eliminated by using a one-megawatt turbine instead of one megawatt of energy from a fossil fuel.

Wind turbines work on a simple principle: instead of using electricity to make wind like a fan, the wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.

Have you ever wondered why most wind turbines have 3 blades, and not more or not less? There's a scientific reason for why 3 is the magic number.
This video will help you to understand why.

The links which helped to know more about this topic:

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