A green steel project being developed by SSAB, LKAB and Vattenfall could lay the foundations for a massive amount of cavern-based hydrogen storage in Europe, with construction starting this week. As one of three components of the Hybrit initiative, which aims to produce the world’s first fossil-free steel by 2024, the group has now broken ground at a rock cavern facility in Svartoberget, Sweden, with the capacity to store green hydrogen on a pilot scale for use in the direct reduction of iron in the adjacent town of Lulea. The project will entail an investment of just over $29 million, divided equally between the shareholders and the Swedish Energy Agency, with ambitions to have the storage facility in operation between…