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Hydropower (from Ancient Greek ὑδρο-, "water"), also known as water power or water energy, is the use of falling or fast-running water to produce electricity or to power machines. This is achieved by converting the gravitational potential or kinetic energy of a water source to produce power. [1] Hydropower is a method of sustainable energy ...
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity , almost 4,210 TWh in 2023, [ 1 ] which is more than all other renewable sources combined and also more than nuclear power . [ 2 ]
The transition to renewable energy depends on non-renewable resources, such as mined metals. [38] Manufacturing of photovoltaic panels, wind turbines and batteries requires significant amounts of rare-earth elements [ 39 ] which has significant social and environmental impact if mined in forests and protected areas.
However many run-of-the-river hydro power plants are micro hydro or pico hydro plants. Much hydropower is flexible, thus complementing wind and solar, as it not intermittent. [92] In 2021, the world renewable hydropower capacity was 1,360 GW. [73] Only a third of the world's estimated hydroelectric potential of 14,000 TWh/year has been developed.
The wind power, solar power and hydroelectric power industries provide good examples of this. Global renewable energy investment growth (1995-2007) [ 1 ] In 2020, the global renewable energy market was valued at $881.7 billion [ 2 ] and consumption grew 2.9 EJ. [ 3 ]
Examples are hydroelectric power or wind power, when the natural phenomena that are the primary source of energy are ongoing and not depleted by human demands. Non-renewable resources are those that are significantly depleted by human usage and that will not recover their potential significantly during human lifetimes.
Nuclear power uses little land per unit of energy produced, compared to the major renewables. Additionally, Nuclear power does not create local air pollution. [123] [124] Although the uranium ore used to fuel nuclear fission plants is a non-renewable resource, enough exists to provide a supply for hundreds to thousands of years.
An example would be the 1995 1,436 MW La Grande-1 generating station. Previous upstream dams and reservoirs were part of the 1980s James Bay Project. There are also small and somewhat-mobile forms of a run-of-the-river power plants. One example is the so-called electricity buoy, a small floating hydroelectric power plant. Like most buoys, it is ...
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