THE light-red tulips were blooming in the warm weather of springtime in Hamburg, Germany, at the end of last May. Entering a steel factory in the Dradenau area, an increasingly warmer temperature comes from the embers in the direction of the furnaces. However, every now and then the biting cold of the wind attacks the skin.

Established in 1968, it belongs to ArcelorMittal. Although small in size and occupying a mere 40 hectares of land, its prod