Thyssenkrupp in Duisburg produces around eleven million tons of steel every year. The gray balls that arise from the reddish iron ore are called sponge iron.
It will be produced in the climate-friendly plant that Thomas Baur helped develop. But what does the future look like? Your SPIEGEL looks at how steel is made in Germany's largest steelworks. For more information, visit ThyssenKrupp's website or the company's Facebook page.