Key points TMC releases return water from its nodule collection system at a depth of 2,000 meters, a level chosen because most fisheries and zooplankton live in the top 1,000 meters of the water column. The company says discharging at 2,000 meters bypasses roughly 95% of marine life, with…

Key points In 2022, Allseas’ pilot system collected nodules from the seafloor and lifted them through a 4-km riser to the surface; the companies have since refined the design and reduced its environmental footprint. The collector is divided into three systems: pickup, processing, and…