Original sentence: The term wind energy is most often used to refer to the collection of useful energy from wind.This can be electrical, as in wind turbines, or mechanical, as used  milling,  or wind pumps, used often for irrigation in agriculture
Edited sentence: The kinetic energy of the wind is harnessed, initially by conversion to a rotation; this rotation can be used in a generator, or directly for a mechanical task, such as pumping, or milling.The term wind energy is most often used to refer to the generation of useful energy from wind.This can be electrical, as in wind turbines, or mechanical, as used in wind pumps, used often in simple agriculture