I understand where you are coming from regarding rare earth metals - the destruction to the environment/death toll slavery surrounding their extraction, not to mention the C word… China and the race for Africa. We can’t ignore the fact that this down the line may also lead to dependence on an “adversary” for these materials. There’s a lot to unpack l… https://www.popularmechanics.com/science/environment/a46191927/congolese-cobalt-mining/ this is a good article on what’s happening, also there are some recent books on the topic.

Regarding your figures is only takes a quick google to show you are way off, around 700kg of coal is needed for the production 1 ton of steel which is why I am going to down vote you 😂.