A massive green steel plant near Boden, Sweden, aims to produce 5 million tons of green steel annually by the end of the decade, using hydrogen from renewable energy to drastically cut emissions. The process, also employed by other companies like HYBRIT and ArcelorMittal, faces challenges like limited green hydrogen availability and higher production costs, but demand from customers like automakers is promising. EU regulations and U.S. funding support are driving the shift towards sustainable steel production, while innovative technologies like electrolysis-based steelmaking offer further potential for zero-emissions steel.