What is wind energy?
Energy is a required sorce to a mental and physical power.
Wind is the movment of air on the surface of the Earth.
For example this flag blows in the wind.
How to use wind energy
This is a wind turbine. When the wind blows it turns the blades. Inside little gears turn. This makes kinetic energy.
There are some complications when using a wind turbine. Somtimes the wind wont blow and when this happens the blade dose not turn. Therefore the gears do not turn witch makes no kinetic en energy. Thats why we do not use turbines all the time for our power.
Why use it?
Wind is natural and you can use it again.