What is the main characteristic of Renewable energy sources?

Renewable energy sources are defined by their ability to be naturally replenished over short periods of time. This means that they can regenerate and be sustainable without the depletion of resources. Examples include solar energy, wind energy, and hydroelectric power, all of which harness natural processes that occur repeatedly, allowing for a continuous supply of energy. This characteristic sets renewable energy apart from fossil fuels and other non-renewable resources, which can be consumed and exhausted over time. Understanding this fundamental aspect helps highlight the importance of transitioning to renewable energy sources in efforts to promote sustainability and reduce environmental impact.