(I)The Persians built the first windmills sometime in the 6th or 7th century AD. for the purpose of powering irrigation pumps. (II) In some early large irrigation projects, mostly in arid and semiarid regions, little attention was paid to drainage. (III) Evolving over the years, by the eighteenth century, windmills were commonly used in Europe and America for grain-grinding and irrigation (IV) Along with waterpower, these provided the basic energy source for the Industrial Revolution. (V) In fact, two centuries ago, nearly every industrial process in existence ran on wind power.