A windmill is a structure that converts wind energy into mechanical power. Traditionally, it consists of large blades that catch the wind, causing them to spin. This spinning motion can be used for various purposes, such as grinding grain into flour or pumping water. Windmills have been used for centuries, especially in places like Holland, where they are iconic symbols of the landscape.
Today, modern windmills, often called wind turbines, generate electricity. They are typically much larger and are found in wind farms, where many turbines work together to produce renewable energy. This helps reduce reliance on fossil fuels and combat climate change, making windmills an important part of the green energy movement.