California-based company Impossible Metals asked the Trump administration earlier this month to auction off mining leases for areas off the coast of American Samoa, which would be within US-controlled waters. Trump’s executive order also directs the Secretary of the Interior to expedite the process for leasing areas for mining within US waters.

President Trump signed an executive order to boost the U.S. deep-sea mining industry for critical minerals. Supporters say deep-sea mining could boost the U.S. economy and reduce reliance on land-based mines, while environmental groups warn of biodiversity loss. The move comes amid U.S. efforts to decrease reliance on China for critical minerals.

The practice of deep-sea mining involves using heavy machinery to remove minerals and metals from the seabed, where they build up into potato-sized nodules.