Wind is created from solar power, as the sun heats the air it rises above the cooler air creating an air current. A wind turbine consists of large propeller like blades which are rotated by the action of the wind. As the blades turn they spin and internal shaft connect to a generator thus transferring mechanical energy to electrical energy. As the primary source of energy is from the wind which is a clean renewable source of energy wind turbines do produce any pollution in the form of greenhouse gases. The animation below shows the workings of a wind turbine.