With negotiations to adopt rules and regulations for commercial deep-sea mining in international waters resuming this week at the International Seabed Authority (ISA), African countries have an extremely important role to play in the future of this industry and the health of our ocean, says Rashid Sumaila, University Killam Professor and Canada Research Chair in Interdisciplinary Ocean and Fisheries Economics at the University of British Columbia in Canada.

ISA, as a UN-affiliated institution, was established in the 1990s to ensure that developing countries would benefit financially from deep-sea mining when/if it starts, ensuring equity in the benefits derived from global commons. As this debate progresses, Africa stands at a pivotal moment where its decisions could profoundly influence the trajectory of this industry and the preservation of marine ecosystems.

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But our research, which looks at the full net cost of deep-sea mining for a wide variety of stakeholders, including mining companies, investors, low-income countries, sponsoring states, and nations involved in terrestrial mining, has uncovered a complex web of risks and rewards.

Mounting scientific evidence suggests that mining would have devastating impacts on fragile seafloor habitats. A single mining operation might discharge massive sediment plumes, significantly affecting light penetration and water oxygenation while dispersing toxins and radioactivity. The price of irreversible ecological damage could be staggering, estimated to potentially surpass the entire global defence budget of about 2 trillion dollars.

And while private companies (and the countries sponsoring their mining operations) stand to make short-term profits from the enterprise, looming business model risks, litigation threats, and technological challenges raise serious doubts about its long-term economic benefits. As new data continues to emerge, we must include the costs of potentially irreversible damage mining causes in our calculus, especially as humanity faces a triple planetary crisis of climate change, biodiversity loss, and pollution.