The reason why the number of windmills in the Netherlands is decreasing now is that the climate and soil have been adjusted. The existence of a large number of windmills and the utilization of wind power are based on the premise of sufficient wind resources in the Netherlands. By draining water from windmills, the Netherlands can create large areas of land. Besides drainage, windmills have several other uses. For example, in the golden age of the Netherlands, a wood sawing and shipbuilding factory was built under the windmill, and the wind was used to drive the machine to run. There is also a mill under the windmill, which uses wind to grind grains and malt to make bread and beer.