Some of us have already seen the wind farms that have been popping up across the United States. They are becoming more popular as wind power technology continues to advance. Wind power is the process when wind energy is converted into mechanical energy (energy that is useful) through the use of wind turbines, wind mills, and wind pumps. Shepherds Flat Wind Farm, Oregon, USA (Photo credit: Wikipedia) The wind turbine is also known as a wind power plant, and it is the giant white tower you see with three blades spinning.