Earth is almost entirely iron, but Aluminum floats in iron so it ends up being a large amount of the crust. But yeah, if we're ever like "gee we don't have eno

Earth is almost entirely iron, but Aluminum floats in iron so it ends up being a large amount of the crust. But yeah, if we're ever like "gee we don't have enough iron" then we've far surpassed all other possible natural resource limits of the planet.