“Using” energy doesn’t mean it goes away. It makes the energy less usable. So the electricity coming in has energy that is easy to do stuff with. The heat is still energy, but it’s so spread out that it’s not really usable.
Similarly, the energy hitting the earth by the sun is roughly the same amount as it gives off. But the light we get is more usable that we give off. Like we might get 1 photons with 100 units of energy and then give off 100 photons with 1unit of energy.
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