Which one among the following is not a renewable energy source?

Which one among the following is not a renewable energy source?

Solar
Wind
Nuclear
Hydroelectric
This question was previously asked in
UPSC CAPF – 2021
Renewable energy sources are those that are naturally replenished on a human timescale. Non-renewable energy sources are finite and are depleted faster than they can be replenished.
Solar energy, wind energy, and hydroelectric energy are all derived from natural processes that are continuously replenished (sunlight, wind currents, water cycles) and are thus considered renewable. Nuclear energy typically relies on the fission of heavy radioactive elements like uranium or plutonium, which are mined from the Earth and exist in finite quantities. While nuclear fuel sources are substantial, they are not naturally replenished at a rate comparable to their consumption, making nuclear energy generally classified as non-renewable, although it is a low-carbon energy source.
Other renewable energy sources include geothermal energy, biomass energy, and tidal energy. Examples of non-renewable energy sources include fossil fuels (coal, oil, natural gas) and nuclear fuels.
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