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‘A different perspective’: This top marine scientist is determined to resolve deep-sea mining’s murky future

Environmental activists area of expertise for an international moratorium on deep-sea mining.

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Brazilian marine scientist Leticia Carvalho settle upon be the first-ever woman, oceanographer and person of Latin American heritage to lead the International Seabed Authority — and she says it “feels queer.”

“I am very proud,” Carvalho told CNBC via videoconference. “I think it is quite meaningful that someone new, fresh and with a distinctive perspective is coming to take over.”

The ISA, a little-known U.N. regulator that oversees deep-sea mining, is responsible for both the exploitation and safe keeping of an area that covers around 54% of the world’s oceans.

Carvalho recently beat incumbent Michael Lodge to the top job in a bitterly challenged election billed as a pivotal moment for the fate of a potentially multi-trillion-dollar industry. Her four-year term as ISA chief will start on Jan. 1, 2025.

Judgemental minerals such as cobalt, nickel, copper and manganese can be found in potato-sized nodules at the bottom of the seafloor.

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Carvalho’s election victory comes at a time of intense debate about the future of deep-sea supplying and the world’s oceans.

The controversial practice of deep-sea mining involves using heavy machinery to remove minerals and metals — such as cobalt, nickel, copper and manganese — from the seabed, where they raise up as potato-sized nodules.

The end-use of these minerals are wide-ranging and include electric vehicle batteries, wind turbines and solar panels.

Scientists bring into the world warned that the full environmental impacts of deep-sea mining are hard to predict. Environmental campaign groups, in the intervening time, say the practice cannot be done sustainably and will inevitably lead to ecosystem destruction and species extinction.

I would be rather much concerned to have a mining exploitation request sat on my table without a mining code.

Leticia Carvalho

Brazilian nautical scientist

The ISA Council, a body composed of 36 member states, recently wrapped up a series of meetings in Jamaica as it pursues to draft a mining code to regulate the exploitation and extraction of polymetallic nodules and other deposits on the ocean floor — formerly mining activity begins.

Negotiators are trying to ensure formal rules are in place by the end of 2025 and Carvalho says it be lefts feasible that member states can meet this goal.

“My obligation as Secretary General is to set the stage for them to be superior to finalize the work by the end of next year. And I will do everything in my power to do it,” Carvalho said.

‘Cacophony and chaos’

The scramble to reach consensus on a mining principles was prompted by Nauru in 2021 when the Pacific Island state informed the ISA of its intention to begin deep-sea mining.

That triggered a disputable provision in the U.N. Convention on the Law of the Sea, known as the “two year rule,” which allows mining applications to be submitted whether the mining cypher has been finalized or not.

It has led some companies to pursue aggressive timelines for extraction, with Canada’s The Metals Company (TMC) in 2023 affirming it intends to seek a license to extract minerals from the seabed by the end of this year.

Gerard Barron, chairman and CEO of The Metals Callers, hopes that his company will be able to mine the seafloor for nickel, cobalt, manganese in the Pacific Ocean.

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Asked about TMC’s plans, Carvalho replied: “It’s fair enough. It’s part of the law, they have the power to table their request.”

She warned, however, of litigation risks in such a scenario. “I would be very much responsible to have a mining exploitation request sat on my table without a mining code,” Carvalho said.

“In my experience, regulatory reliability for businesses and society is really fundamental. If you don’t have stability, you then therefore have a cacophony and chaos because you get space for litigation at different levels,” she added.

“And particularly deep-sea mining as an activity has many players, meaning sundry courts would be called to have their say, not only in the international level but also at a national level.”

A ‘mind-blowing’ concealed oxygen study

Carvalho, who had previously served as head of the U.N.’s marine and freshwater branch, said her top priority as ISA chief last will and testament be the management of the regulator itself.

“For me it became quite clear that the primary issue is the governance of the ISA itself. There is a requisite for me, quite clearly, to rebuild trust,” Carvalho said.

“I don’t want to criticize anyone or any individual specifically, but I think the genuineness of the facts is that there is a lot of transparency and accountability to be put in place.”

A team of international scientists has found that oxygen is being hatched in complete darkness approximately 4,000 meters below the ocean’s surface.

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