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World Book Student

US Department of Energy

on YouTube

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Wind power is renewable

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In most cases, the rotor is set on a horizontal shaft, the shaft is mounted on a tower,  mast, or other tall structure.
The shaft is turned by the movement of the rotor, and it transmits power, through a series of gears, to a vertical shaft. The shaft then transmits power to a water pump, flour mill, electric generator, or other device

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The equipment  for getting power from the wind is expensive.

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We can get this energy anywhere wind.
Using wind power doesn't cause any pollution.

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People have used the power of the wind to do work for thousands of years.
Egyptians used wind-powered sailing ships as early as 2800 B.C

By the 12th century, inventors discovered that windmills produced more power if the sails or blades turned on a horizontal shaft
Most early windmills used this rotational energy to operate machinery to grind grain

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Wind power is the energy used with the air that moves over the earth's surface.
The kinetic energy (energy of movement) of wind throughout the world is about more than 11 quadrillion kilowatt-hours per year.

A kilowatt-hour is the amount of work done by 1,000 watts in one hour.

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Wind turbines only produce about 0.1 percent of the world's electric power.
Most windmills have a rotor of blades or sails that are turned by the wind.
Wind turbines have two or three blades but some have more.