Answer» - Hydroelectric energy, solar energy and wind energy is obtained respectively from flowing water, solar radiations and flowing wind.
- These sources, i.e. water reservoirs, sun and the wind are inexhaustible and sustainable. They will not be finished.
- On the contrary, the conventional energy sources such as coal and fossil fuels have limited reserves.
- They cannot be renewed and may get exhausted in future. Hydroelectric energy, solar energy and wind energy can be replenished and hence they are called renewable.
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