A windmill is a machine or structure which converts wind energy into rotational energy with the help of blades known as sails. From over the period of time, the energy which is produced by windmill is used to grind grain into flour. Windmills also provide energy to windpumps, hammermills, saw mills and paper mills for obtaining fresh water from underground.

Mankind is using renewable power of wind with the help of windmills from over the period of time. A windmill is a machine or structure which converts wind energy into mechanical energy with the help of blades known as sails, which is used to grind grain; saw timber and pumping of water for irrigation and water supply.

E.ON Climate and Renewables (EC&R) in October 2009 completed the Roscoe Wind Complex, a project which spans four Texas counties with an area of nearly 100,000 acres and is now the world’s biggest wind farm.

The Mid-America Windmill Museum is located in Kendallville, Indiana United States, which is a popular destination for both picnic and educational visit. The main goal of this museum is to gather the information, storing it, display it and tell the stories of the wind power.