An energy source refers to any substance or form of energy that can be converted into a usable form to perform work or produce power. Examples include fossil fuels, renewable sources like wind and solar, as well as nuclear energy.
Related terms
Renewable Energy: Energy derived from sources that are naturally replenished over short periods such as sunlight, wind, and water.
Non-renewable Energy: Energy derived from finite resources that cannot be easily replaced once depleted, such as fossil fuels.
Hydropower: Electricity generated by harnessing the power of flowing or falling water to drive turbines and generators.