Hydroelectricity is a versatile form of electricity with many forms of energy production, all coming from water and its rushing power. It is completely renewable and relies solely on the natural water cycle. Invented over 2,000 years ago, hydropower (also known as hydroelectricity) is a millennia-old technology that was used to grind wheat and has stood the test of time. Currently, many people are debating the viability and renewable nature of hydropower. This document is intended to provide information to reflect on. Hydropower harnesses the power of water, with which harnessing even a tiny fraction of the energy produced by oceans and waterways could provide exponentially more energy than is needed to run the whole earth. Hydropower has also proven to be economically viable in many respects, but initially expensive. Many hydroelectric plants require little maintenance and can provide power for centuries, demonstrating enormous potential as a continuously renewable energy source. While hydropower has many positive impacts on a constantly deteriorating environment, it can also have negative effects on the environment. There have been many recent and long-term developments in the field of hydropower and scientists are continually working to improve efficiency and explore new avenues for building any type of hydropower. Today, hydroelectricity provides a large part of the world's electricity demand. Although hydropower is in decline in some areas, innovations and growing demand are increasing the need for newer, more efficient renewable energy. Today, around 20% of the world's energy is produced by hydroelectricity. There are four main types of hydropower, each with its own advantages ... middle of paper ... profit to be gained from other power plants in the system due to the greater efficiencies achieved. (16) This actually means that hydropower not only provides a renewable and sustainable source of electricity and income, but it can also be multi-tiered and meet more than one need. However, one of the repercussions of hydroelectric development is its impact on the inhabitants of the area swallowed by the water of the created dam. However, hydropower can create construction and engineering jobs, attracting more people to the affected area. One of the most important aspects of hydropower is its renewable nature. By its basic principles, hydroelectricity is a completely renewable form of energy. It relies solely on the natural water cycle, a phenomenon that would only stop if all our solar and geothermal energy disappeared. However,