The atmospheric air possesses kinetic energy. This energy is called wind energy. As a renewable energy source, wind energy has been used for hundreds of years for purposes like sailing, grinding of grains and for irrigation. Wind energy is indirectly obtained from solar energy. The earth temperatures are different all across the world and so some places receive more heat than others. The places where earth gets heated fast get warmer air that being light rises up. The cooler air from surrounding areas rushes to take the place of warm air causing winds.
The first and the earliest use of wind renewable energy was made by the Egyptians about five thousand years back who used this renewable energy source to sail their boats from one shore to another. The first windmill that could capture renewable wind energy was built in Babylon around 2000 BC.
The renewable wind energy that is obtained from the sun is very small in quantity because only about three percent of the solar energy gets converted to wind energy.
In order to get the maximum benefits from this renewable energy source, wind energy needs to be utilized optimally. As a renewable alternative energy source, wind energy will be available for as long as the sun shines.
The cost of using the renewable wind energy depends upon the size of the wind turbine that is installed, the amount of wind available and the cost of maintaining a wind turbine.
Wind energy is considered to be one of the most important alternative energy sources available today.