Dozens of countries have called for a moratorium on seabed mining, and have urged restraint until an international authority agrees on rules for the practice.

Hawaii leaders are speaking out against an executive order by President Donald Trump that opens the door for large-scale mining of the ocean floor, both within U.S. waters and internationally.

President Donald Trump wants federal agencies to fast-track applications for deep-sea mining in an effort to make the United States a global leader in the nascent industry.