Wind power is probably the most economical of all sources of energy
. The power of the wind can be utilized by using a wind turbine or what is popularly known as the windmill. They can convert wind power into mechanical energy, which can be used to grind grains or pump water; and electric power with the use of generators. It can be said that it is like an electric fan working in reverse, instead of electricity making the blades rotate to produce wind, the wind rotates the blades to produce electricity. Large wind turbines can be grouped together in a wind farm to produce large quantities of electricity for public use. There are also small scale wind turbines that can be used at home. They are very clean, renewable and can dramatically reduce electric bills.