I don't understand why energy sources like solar or wind energy called renewable energy. Who is renewing the energy? The Sun is dying. Everything that exists has to perish. Also, the energy itself is not renewed. Once spent, it is lost forever.
Why is it then called renewable? What could be more appropriate name for it?
These "renewable energy sources" are usually non-polluting sources. So can it simply be called non-polluting energy?
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