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Geothermal never will be. Never. Not ever. It works only in certain regions and can't be exported that easily. Iceland has so much of it because of its position on the Mid-Atlantic Ridge divergent plate. No other regions can do what Iceland can
This is emphatically not true. We're not on a tectonic plate fault. We have zero volcanoes. We do have huge geothermal potenital though. Based on current known technology it seems we could reach 20% of electrical consumption and 100% of our heat needs thanks to geothermal. If instead of fighting wars we invested in geothermal, we'd be sorted. But the energy companies won't be happy about that because they won't be able to sell it for as much. If people can heat their water for free, that's gonna cause British Gas shares to plummet.
There's a million things that go into making oil a viable source too. We're drilling under the sea for fuck's sake. How can that ever be cheaper and more efficient than drilling a hole on land? Oil is limited, there's only so much you can take from a well before it runs dry. Not so with geothermal. The energy potential within the Earth is obviously sufficient to meet our needs, I don't think you can argue that. But we either already could create the technology to move forward with it, or we damn well should be able to.
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