Polymetallic nodules on the sea floor rich in cobalt, nickel, copper and manganese could be worth trillions of dollars and mining companies want in. Most nodules lie in international waters where the seabed and its mineral resources are under the jurisdiction of the International Seabed Authority. The ISA says no mining of the international seabed should happen until global regulations are in place, but US President Donald Trump this year signed an executive order prioritising seabed mining, eve