August 20, 2025 — The deep sea, the planet’s most expansive and least understood ecosystem, remains largely unexplored. Yet while the deep sea may seem a dark and distant space, events underwater directly impact our lives, from essential services like climate regulation to fisheries and the marine food web. While scientific understanding of this realm is nascent, a new industry is rapidly emerging driven by the demand for rare metals essential for batteries, microchips and AI: deep-sea mining.
In the past three years, more than 38 nations have voiced support for a moratorium on deep-sea mining, a rapid pace by the standards of multilateral lawmaking, and the equivalent of one new country signing on per month. This progress marks a major shift from just a few years ago, when states were either supportive of mining, reluctant to take a position, or were simply uninformed.
The triggering of a treaty provision known as the “two-year rule” by the nation of Nauru in 2021, intended to accelerate deep-sea mining in areas beyond national jurisdiction, brought increased attention and scrutiny to the activity. Nevertheless, some private actors are pushing for the granting of applications for commercial deep-sea mining of minerals like copper, nickel and cobalt, despite significant concerns from global leaders, the scientific community and the public at large.
This divergence between scientific understanding and prevailing narratives came into sharp focus at the recent annual meeting of the International Seabed Authority (ISA). There, nations gathered to discuss matters profoundly consequential for the future of the deep ocean. However, there also seemed to be a broad understanding that a strong regulatory framework based on science, equity and precaution must be in place before an informed decision can be taken, and that no mining activities should commence in the meantime.
Moving forward, it’s imperative that we actively counter misinformation, significantly invest in scientific research, and, in the interim, take concrete measures to ensure that deep-sea mining activities do not commence in the absence of clear science, robust regulations, sufficient safeguards, and equity.