Recycling metal for power cores is a good first step, it cuts down on mining and the environmental hit of extracting new ore. The catch is that recycled metals can bring impurities that bite at efficiency, so you need clean‑up processes and solid testing. If you get the metallurgy right, a recycled core can be as efficient as a new one while still being greener, especially when you pair it with renewable energy for the rest of the system. Just keep an eye on the overall carbon budget—after all, we don’t want to turn the planet into a blacksmith’s forge.