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Right under our feet is the future of clean, renewable energy.
The temperature of the Earth's core, which is what we're referring to, is approximately 5,200° Celsius (9,392° Fahrenheit), making it about as hot as the sun's surface. If we could harness this heat, we could turn it into a source of unimaginable amounts of renewable energy — if we drill down far enough. However, some of that heat also travels upward through the Earth's thick mantle, to the surface.
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