Don't worry lots of 2nd and 3rd world countries still use crazy amounts of coal to produce steel but there are some interesting misconceptions about emissions and construction materials especially concrete and steel. They could both be much more "green" if required. If I recall there was a place in Europe that was experimenting with tungsten filament cement kilns that had emissions extremely low but just could not compete with the cost of traditional kilns so everyone went "who cares?". I just wanted to show that we are so close to somewhat sustainable methods if we would only force that leap. Even the energy required could be renewable and semi-sustainable with mass thermal storage and photovoltaics. There is just so much wrong with how we currently take every step of construction we do literally nothing the proper way.

I just don't feel like the coal to steel conversion is the crux for disbelief of the plan to re-ice the arctic using millions of pumps. Even if it were to work I think there is an ethical debate to be had because this isn't a fix it is a band-aid and likely wouldn't do anything but kick the can down the road a few years.