Here’s fun fact: the world’s deepest manmade hole goes 15 kilometers into the ground. They stopped drilling at the 15th kilometer because it got too hot at the bottom of the hole. Welcome to geothermal energy, the reason most religions depict Hell as a place deep underground and the reason why we may succeed in building a clean energy future for the planet without turning it into a disco ball of solar panels. Geothermal energy is, simply put, heat; heat that is generated from the decay of radioactive elements in the planet’s mantle.…
