If a particular section of river has the right terrain to form a reservoir, it may be suitable for dam construction. Therefore no pollution is released into the atmosphere and no waste that requires special containment is produced. A dam's gates can be opened or closed on command, depending on daily use or gradual economic growth in the community. The production of hydroelectricity is often slowed in the nighttime when people use less energy. The reservoir of water resulting from dam construction, which is essentially stored energy, can support fisheries and preserves, and provide various forms of water-based recreation for locals and tourists.
Land owned by the hydroelectric company is often open to the public for hiking, hunting, and skiing.
Not to mention the economic stimulation provided by employment. Hydropower may be better on the environment than fossil-fuel sources, but its future is so uncertain that we may need to focus on other alternatives. Hydroelectric power is also very efficient and inexpensive. Efficiency could be further increased by refurbishing hydroelectric equipment. Some regions depend on it more than others.