We have, for all intents and purposes, an unlimited supply of carbon and iron. Assuming we one day get over our FUD of nuclear energy (which with the use of bre

We have, for all intents and purposes, an unlimited supply of carbon and iron. Assuming we one day get over our FUD of nuclear energy (which with the use of breeder reactors is considered a renewable form of energy), it follows that steel itself can be considered renewable.