by Building High Rise Dames which Collects Falling Water, Moving due to Potential Energy, Harvesting the Kinetic Energy by Making them Spin Blades of Turbines Connected to Electric Generators Situated at the Bottom of a Dam to Produce Electricity, Hydroelectric Energy Do not Produce Waste Products of Pollutants, Free and Inexhaustible, Reliable, Obstructs Flow of Water, Requires a Lot of Land and is Expensive, Affect the Quality of Downstream Water