Hydroelectric plants are facilities that generate electricity by using the power of flowing water. They typically harness the energy from rivers or dams, where water is stored in a reservoir. When released, the water flows through turbines, causing them to spin and produce electricity. This process is clean and renewable, making it an important source of energy in many countries. These plants can vary in size, from large installations that provide power to entire cities to smaller systems that serve local communities. By using water as a resource, hydroelectric plants help reduce reliance on fossil fuels and lower greenhouse gas emissions, contributing to a more sustainable future.