However much solar or wind energy we use, the Sun will last exactly as long. This is not a matter of scale. Even if we were to build a photovoltaic Dyson sphere around the Sun, it would have the same lifespan.
That is not the case for geothermal. It could in theory be cooled down if exploited at a massive scale.
Saying geothermal is not renewable is not an indictment nor a criticism. Geothermal is great and we should use it more. It's just technically not renewable, but that doesn't matter.
And after a hundred generations of this there will be no fusible material left. We can extract energy from rotating black holes until they stop, and then the universe is dead.
Then solar and wind aren't technically renewable either, because the sun is going to eventually consume the earth and explode.
Geothermal is renewable.
However much solar or wind energy we use, the Sun will last exactly as long. This is not a matter of scale. Even if we were to build a photovoltaic Dyson sphere around the Sun, it would have the same lifespan.
That is not the case for geothermal. It could in theory be cooled down if exploited at a massive scale.
Saying geothermal is not renewable is not an indictment nor a criticism. Geothermal is great and we should use it more. It's just technically not renewable, but that doesn't matter.
And a new star will eventually form from the debris, so "renewable" is a function of time scale.
And after a hundred generations of this there will be no fusible material left. We can extract energy from rotating black holes until they stop, and then the universe is dead.
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Then no power source is "technically" renewable.