The Metals Company (TMC) said Wednesday it had collected an initial batch of seafloor polymetallic nodules, and transported them up a 4km-long riser system to the surface in the Clarion Clipperton Zone of the Pacific Ocean.TMC, the explorer of what it says is the world’s largest estimated undeveloped source of critical battery metals, said the move was a historic one, representing the first integrated system test conducted in the area since the 1970s."Having successfully completed…