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Is seabed mining an economic necessity or a hazard?

January 28, 2024
in Business
Is seabed mining an economic necessity or a hazard?
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By Emma Woollacott for the BBC

Photo: Supplied

Deep-sea miner Gerard Barron insists that his company’s extraction method has little impact on the environment.

His firm, The Metals Company, uses remote-controlled machines the size of trucks “to scoop up rocks sitting on the sea floor”.

These rocks are then crushed and processed to release a number of key minerals in high demand for the production of batteries – cobalt, nickel, copper and manganese.

Currently continuing testing work, the Canadian business hopes to get authorisation to start commercial mining in international waters in the north Pacific as early as the end of 2025.

At present such commercial extraction is not allowed by the International Seabed Authority (ISA), the UN body that regulates the seafloor in international waters. However, the ISA and its 169 member states, are due to meet later this year to try to finalise rules that may potentially allow it to start, with a final vote expected within 24 months.

Some 30 countries including the UK, Brazil, Canada, France and Germany want the ban to continue because of concerns about the environmental impact. However, other nations, including China, are keen for large-scale deep-sea mining in international waters to get the go-ahead.

Could wipe out entire species

It comes as Norway made headlines last week when it became the first country in the world to allow future deep-sea mining in its territorial waters. The US is exploring the possibility of doing the same, with President Biden ordering the Pentagon to submit a report on the issue by 1 March.

This move follows after 31 members of Congress wrote an open letter about deep-sea mining in December, saying that the US “must explore every avenue to strengthen our rare earth and critical minerals supply chains”.

In addition to harvesting rocks (more formally called “polymetallic nodules”) lying on the seabed, other deep-sea mining methods are more invasive, and involve digging down.

The World Wide Fund for Nature (WWF) is opposed to all deep-sea mining on the grounds that it says it presents an unacceptable risk to marine life.

Deep Sea Mining - From a dedicated control room aboard the Hidden Gem, Allseas engineers successfully drove the pilot collector vehicle over 80 kilometers across the seafloor in the NORI-D exploration of the Clarion Clipperton Zone of the Pacific Ocean.

Deep Sea Mining – From a dedicated control room aboard the Hidden Gem, Allseas engineers successfully drove the pilot collector vehicle over 80 kilometers across the seafloor in the NORI-D exploration of the Clarion Clipperton Zone of the Pacific Ocean.
Photo: The Metals Company

“If the industry proceeds, the intensity and methods of deep seabed mining could destroy entire habitats and species,” says Kaja Loenne Fjaertoft, a marine biologist and senior advisor for sustainable oceans at the WWF.

“Many species living in the deep sea are found nowhere else. Disturbances in just one mining site could wipe out entire species.”

She adds: “As well as the direct destruction of ecosystems when minerals are mined, major damage and disturbance would likely arise from light noise and sediment pollution.”

Balancing act

This concern is echoed by the European Academies Science Advisory Council (EASAC), the independent body that guides the EU on its scientific policy. “It’s unavoidable that the actual process of mining is physically disruptive, and would more or less wipe out any biota [animals and plants] in the areas directly mined,” says the EASAC’s environment director Prof Michael Norton.

“There’s also a chance of second-level effects on the adjoining sea beds or adjoining water column.”

Prof Norton also questions the need for deep-sea mining in the first place. “It produces a lot of manganese, which we’re not short of. It produces, in some cases, cobalt and nickel, which are actually used in some of the clean energies, for instance, batteries, but they’re not rated by the European Commission as being particularly at supply risk.”

The area of the north Pacific that The Metals Company wants to mine is called the Clarion-Clipperton Zone. This is a vast section of ocean located between Hawaii and Mexico, which measures 4.5 million sq km (1.7 million sq miles).

Barron says that mining here would cause far less environmental disturbance than existing mining on land. He points to current nickel extraction, where the world’s largest two producers are Indonesia and the Philippines.

There has long been concerns about the impact this mining has on rainforests in both countries.

“The area we’re focused on, where these rocks sit, is the abyssal zone,” says Barron. This perpetually dark zone is 3000m to 6000m (10,000ft to 21,000ft) below sea level.

“Here there’s zero flora. And if we measure the amount of fauna [animal life], in the form of biomass, there is around 10g per square metre. That compares with more than 30kg of biomass where the world is pushing more nickel extraction, which is our equatorial rainforests.”

Sea Life Underwater Rocks Sunlight, Underwater Life, wildlife

Photo: 123RF

The WWF’s Fjaertoft counters that demand for new mineral mining sites could be reduced via investing more in the processing of existing mining waste, as well as through more recycling. “There are also various technologies in the early stages of research that may have significant contributions to decreasing future demand for key minerals,” she adds.

Meanwhile, another firm that wishes to start commercial deep-sea mining, Norway’s Loke Minerals, told the BBC last week that more study into the environmental impact was required.

The ball is now in the court of the ISA and such is the sensitivity of the issue that it is difficult to know what it will do.

The ISA did not respond to requests for an interview.

Norton says that deep-sea mining needs “strong environmental regulations”, but that the ISA also faces “a balancing act”. “What they need to do is really address the issue of the balance between risk and need.”

– This article was first published on the BBC

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : RNZ – https://www.rnz.co.nz/news/environment/507733/is-seabed-mining-an-economic-necessity-or-a-hazard

Tags: businessMiningSeabed
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