Sometimes you notice that a quiet worry has evolved into something completely different. Not quite a panic. It’s more akin to a group clearing of throats, with academics, scientists, and historians all focusing on the same issue at roughly the same time, during the same season, and with the same urgency in their voices.
Over the past few months, deep-sea mining has been experiencing that. The Natural History Museum released what it described as the most thorough analysis of the potential effects of ocean-floor extraction on marine life to date. The cultural and ecological stakes were thoroughly investigated by Yale Climate Connections. Harvard’s International Review posed pointed queries regarding the industry’s ability to fulfill its promises. Sir David Attenborough went so far as to urge governments to completely abandon plans.
These things might be coincidental. Research is published by institutions according to their own timetables. However, there’s a sense that something has changed; researchers are aware that the window of opportunity to have this discussion before industrial-scale mining starts is rapidly closing.
To create his team’s review, Natural History Museum professor Adrian Glover spent two years going through over 200 published and unpublished reports. He did not find comfort. The enormous, silty, pressure-crushed abyssal plains that span thousands of kilometers across the ocean floor may take decades to recover from mining disturbance. Perhaps. However, the impact of the hydrothermal vent systems—those massive geothermal formations that are home to tube worms, crabs, and unidentified species—remains largely unexplored. Simply put, there is no data. “It is surprising,” Glover said, “that such a major environmental issue has not yet been comprehensively reviewed.”
The machines in question are amazing and a little unnerving to consider. They are lowered to a depth of about 15 Empire State Buildings, or nearly 6,000 meters, where they scrape and vacuum the seafloor, gathering potato-sized nodules that are rich in manganese, cobalt, nickel, and copper. Built up grain by grain over geological time, each nodule may be ten million years old. Unusable sediment is returned to the water column and drifts through ecosystems that have never been impacted by industry in clouds.
The abstract concept of ocean governance quickly becomes personal for Solomon Pili Kaho’ohalahala, a Native Hawaiian elder who grew up fishing and gathering on Lana’i. He has been attending international regulatory conferences in an effort to introduce a viewpoint that is not inherent in the language of seabed licensing agreements. “For them, it’s just a money deal,” he replied. The stark contrast between spreadsheets and a generation-old way of life is difficult to ignore.
Additionally, the political environment is not peaceful. In 2025, President Trump issued an executive order that expedited permits for US corporations to explore international waters, circumventing the UN body that is acknowledged by the majority of countries as the governing body. A moratorium has been formally demanded by more than 40 nations. There are bans in four states in the United States. Protesters against climate change have actually sailed out to confront research ships at sea.
Scientists have long expressed concerns about deep-sea mining, so it’s not the alarm itself that is striking about the convergence of institutional warnings. The timing is the issue. The International Seabed Authority is in the process of finalizing regulations. The proximity of commercial operations is unprecedented. Furthermore, the most fundamental question remains unanswered by the research: what precisely is lost, and is any of it returning?
Whether the warnings will arrive in time is still up in the air. There is a genuine need for the minerals, there is significant pressure on the supply chains, and there are significant economic benefits. However, there’s a feeling that simultaneous publications by institutions aren’t coincidental. They are keeping an eye on a clock.
