Windmills are tall structures with large blades that catch the wind to generate energy. They have been used for centuries to grind grain, pump water, and produce electricity. The wind turns the blades, which then powers a generator or mechanical system, making windmills an important part of renewable energy. Today, many countries are investing in modern windmills, often called wind turbines, to help reduce reliance on fossil fuels. These turbines can be found in wind farms, where multiple units work together to produce clean energy for homes and businesses. Windmills symbolize a sustainable future, harnessing nature's power for our needs.