A windmill is a mechanical device that uses wind energy to drive water.
A wind turbine is a mechanical device with adjustable blades or wheels that generates energy to operate. The old windmill was developed from a sail. It had 6 to 8 sail-shaped canopies, distributed around a vertical axis, when the wind blew it rotated around the axis like a rotating lantern. Due to its low efficiency, this type of wind turbine has been gradually replaced by horizontal rotating shaft wood fabric wind turbines and other wind turbines, such as "vertical wind turbines", "automatic rotor wind turbines", etc. .
Most current wind turbines are used to produce electricity. The principle is to use wind energy to turn the blades of the wind turbine, then use a speed multiplier to increase the rotation speed. Rotation for incentiveer the generator to produce electricity. Wind energy is attracting widespread attention around the world because it poses no fuel problems and does not produce radiation or air pollution.