Hydropower generation is a method of producing electricity by using the energy of flowing water. Typically, a dam is built on a river to create a reservoir, which stores water. When the water is released, it flows through turbines, causing them to spin. This spinning motion generates electricity, which can then be distributed to homes and businesses. One of the main advantages of hydropower is that it is a renewable energy source, meaning it can be replenished naturally. Additionally, it produces very low greenhouse gas emissions compared to fossil fuels. Countries like Norway and Brazil rely heavily on hydropower for their energy needs.