A bit of a stretch maybe, but I’m considering us to be discussing whether an energy source is renewable on Earth. The Sun is not renewable, but by the time that it’s no longer viable the Earth will be long gone as well! So as long as the Earth exists, I would say that solar PV and other solar driven processes like wind and hydro are renewable.
By these standards yes, deep geothermal and tidal are “not renewable” either.
But if you go according the strict physical principle every energy source is non-renewable
The sun fuses a finire amount of hydrogen, earth has a finire amount of latent heat, the moon a finire amount of gravitational inertia etc.
And there’s a little paradox if you think about it, how can fusion be non-renewable but solar, that use radiation from the sun fusion, be renewable?
A bit of a stretch maybe, but I’m considering us to be discussing whether an energy source is renewable on Earth. The Sun is not renewable, but by the time that it’s no longer viable the Earth will be long gone as well! So as long as the Earth exists, I would say that solar PV and other solar driven processes like wind and hydro are renewable.
By these standards yes, deep geothermal and tidal are “not renewable” either.