As hidrelétricas, or hydroelectric power plants, are facilities that generate electricity by harnessing the energy of flowing water. They typically use a dam to create a reservoir, allowing water to be stored and released in a controlled manner. When water flows through turbines, it spins them, converting kinetic energy into electrical energy. These power plants are a significant source of renewable energy, contributing to a cleaner environment by reducing reliance on fossil fuels. Countries like Brazil and Canada have invested heavily in hidrelétricas, making them a crucial part of their energy infrastructure and helping to meet growing electricity demands.