Hydroelectric PowerOne of the first ways to harness energy is to use the powerful flow of water. On September 30, 1882, the first ever dam was built in Appleton, Wisconsin. Since then, more than 2,044 billion kilowatt hours have been produced every day worldwide. This energy source is used more and more days because it is very reliable. But how does it actually work and how does it produce electricity? First, dams are located in a location where the water moves fast and fast. This is very important. When water enters the dam, it passes through a series of giant pipes. At this point the water hit the turbine blades, causing it to spin. From there the water reaches the end of the dam and continues its regular flow into the river. To find out where electricity comes from we have to go back to turbines. As the turbines spin, a long, thick stick protruding from the side is connected to a generator filled with magnets. This is where all the electrons are produced. Ultimately, the energy flows through power lines and reaches homes and businesses in the area. There are many advantages to using dams. First, we have virtually an unlimited water source. Additionally, these dams are sturdy and could last for years and years. Furthermore, dams do not add any pollution to the environment, as fossil and nuclear fuels do, which is now a major problem. Finally, it is a reliable source. Unlike wind and solar energy, we could use it day and night and we know it will be available the next day. There are some disadvantages to having a dam. First of all, they are very expensive. Dams have a lot of expensive equipment. Furthermore, a dam requires a lot of space to build and powerful water. Both of these requirements make it difficult to find a place to build a dam. Worse, when you build a dam, you may have to evacuate people to do the actual construction. On average, 80,000 people need to be evacuated. All in all, I think hydroelectric dams should be the world's main source of energy.