A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades. Centuries ago, windmills usually were used to mill grain, pump water, or both. Thus they often were gristmills, windpumps, or both. The majority of modern windmills take the form of wind turbines used to generate electricity, or windpumps used to pump water, either for land drainage or to extract groundwater.

https://en.wikipedia.org/wiki/Windmill

Windmill Netherland Kinderdijk Sunset Clouds Sky Landscape

This drawing dedicated to my beloved grandfather ^^ My grandfather was everything to me! Cause...

"There are all kinds of interesting questions that come from a knowledge of science, which only adds to the excitement and mystery and awe of a flower."
Richard Feynman
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