Trump issued an executive order Thursday declaring that U.S. policy includes “creating a robust domestic supply chain for critical minerals derived from seabed resources to support economic growth, reindustrialization, and military preparedness.” He described seabed mining as both an economic and national security imperative necessary to counter China.

Increasingly, mining companies have been eager to scrape the ocean floor for cobalt, manganese, nickel and other metals that could help make batteries for cellphones and electric cars. But scientists have warned that the process could irreparably alter the seabed, kill extremely rare sea creatures that haven’t been named or studied, and — depending on how the metals are carried up to the surface — risk introducing metals into fisheries that many Pacific peoples rely upon.

The order aims to jump-start the industry that has been spearheaded by small Pacific nations like Nauru seeking economic growth, but has been facing growing pushback from Indigenous advocates who fear the lasting consequences of mining the deep sea.

“This extraction has no thought in mind about caring for resources,” said Solomon Kahoʻohalahala, who is Native Hawaiian and has been a vocal critic of the potential seabed industry at the United Nations. “It seems that there’s no vision for what we do in the long term,” he said. “It doesn’t speak to how we’re looking to take care of resources for the generations that are unborn. That’s a very different perspective that I hold as an Indigenous person.”