1. 20% of the world’s electricity consumption in 2006 was generated with hydroelectricity (generating electricity from hydropower), the most used renewable energy source in the world. Geothermal power, hydropower, biomass, and tidal power are additional forms of renewable energy that produce power for our planet right now. Disadvantages of Hydroelectric Energy. The hydroelectric energy requires a low cost of maintenance and operation. Disadvantages of Hydroelectric Energy. Due to the water cycle, the availability of water to generate electric power is almost inexhaustible. Advantages of hydropower.

Moreover, the dams are for long term use, therefore, the supply of energy is also for long time durations, and a long term for the saving. For this reason, hydropower is a renewable energy source with high energy efficiency. Hydropower systems are very efficient because of the density of water, the force of gravity and the technological advantages of today. list of Disadvantages of hydroelectricity is below: Hydroelectric power generation creates environmental consequences

Hydro power is a very efficient source of renewable energy. These systems can covert up to 90% of the energy of water into electric energy, which is an astonishing number. Hydroelectric power plants may affect fish is a complex interaction between numerous physical and biological factors. Are there any disadvantages? Since hydroelectric power has few parts, replacement may be in less necessary. Brief disadvantages of hydroelectric power: 20% of total electrical energy is generated from the hydroelectric power plant in the world. Hydroelectric power stations certainly have their advantages and disadvantages, as do all forms of electrical generation. Hydropower, the creation of mechanical energy through the transfer of kinetic energy created by the flow of water, is currently the only large-scale renewable alternative to traditional electricity sources, such as fossil fuels [1].As economic development spreads throughout the world, so does the demand for electricity, causing global electricity production to double in just the last two decades. (d) Describe two economic advantages and two environmental disadvantages of hydroelectricity. So in spite of seeing only advantages of hydroelectric energy we should see another side also. The primary advantage of renewable energy is that fewer potentially harmful emissions are released into the atmosphere. The characteristics of this type of energy have certain advantages and disadvantages.

Environmental Consequences The environmental consequences of hydropower are related to interventions in nature due to damming of water, changed water flow and the construction of roads and power lines. Hydroelectric Energy Pros and Cons. (4 points) (4 points) 2.The following table shows the amounts of electricity generated by photovoltaic solar cells and by wind in the United States from 2002 to 2007 (in thousands of megawatt-hours):

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