Which energy source is considered renewable?

Solar energy is considered a renewable energy source because it derives power from the sun, which is a virtually inexhaustible resource over human timescales. The sun continuously emits energy in the form of sunlight, which can be harnessed using solar panels and other technologies. This process does not deplete the sun's energy and allows for sustainable energy production without the significant emissions associated with fossil fuels.

In contrast, petroleum and natural gas are fossil fuels that form over millions of years from organic material and, once consumed, release greenhouse gases that contribute to climate change. These resources are finite and can lead to environmental degradation once extracted and utilized. Nuclear energy, while it does not emit greenhouse gases during operation, relies on uranium, which is also a finite resource and presents challenges related to radioactive waste and potential accidents. Thus, solar energy stands out as a clean, sustainable option that can be replenished naturally.