Company approved the final construction and development of its cobalt operations in the US state of Idaho, with the first production expected in mid-2022.
Oxford researchers say it is possible to extract copper, gold, zinc, silver and lithium from brines trapped in porous rocks at depths of 2 kilometres below dormant volcanoes.
The Pacific island nation has notified a United Nations body of plans to start deep-sea mining, giving the International Seabed Authority two years to complete long-running talks on rules governing the new and controversial industry.