Norwegian Deep-Sea Mining Threatens Arctic Biodiversity With 'Irreversible Harm'

Norway's plans to move forward with deep-sea mining could do irreparable damage to unique Arctic ecosystems and even drive unobserved species to extinction.

That's the warning issued Friday in a Greenpeace report titled Deep Sea Mining in the Arctic: Living Treasures at Risk. The environmental group argues that Norway's mining plans contradict its previous ecological commitments, such as its 2020 pledge to manage 100% of its ocean area sustainably by 2025.

"The measure of a nation's success is not how many promises it makes, but how it honors them and how much of its ecosystem is safeguarded for present and future generations," Greenpeace Nordic campaigner Haldis Tjeldflaat Helle said in a statement. "While Norway claims to be a respectable nation with responsible policies on ocean management, it's rolling out the red carpet for deep-sea mining companies to deploy machines that will cause irreversible harm to the Arctic's unique and vulnerable biodiversity. Somehow Norway's words and ocean commitments get forgotten when profit opportunities arise. We cannot let that happen."

"Mining will cause permanent damage to those ecosystems and it will remain impossible to assess the full extent of those impacts, let alone control them."

Norway's parliament sparked global outrage when it voted to explore its Arctic seabed for minerals in January 2024. Its Ministry of Energy then released a plan for the first round of licenses in June. The country aims to extend its first licenses next year and see mining begin by 2030.

Now, the Greenpeace report details what would be at stake if it does so.

"The Arctic is a unique and vital marine environment, home to one of the world's most fragile and diverse ecosystems, crucial for global climate regulation and supporting a wide array of species found nowhere else on Earth," Greenpeace International executive director Mads Christensen wrote in the report foreword. "The recent decision by Norway to open up 281,200 square kilometers of its claim to an extended continental shelf to deep-sea mining is putting ocean life and the livelihoods of those who depend on it at grave risk."

The mining would threaten life at all levels of the ocean and all nodes in the marine food web. Norway is hoping to mine for metals in the manganese crusts around hydrothermal vents, but these vents have also enabled a diverse array of life.

"They are home to creatures such as stalked jellyfish, tube worm forests, fish that produce antifreeze, and hairy shrimps hosting colonies of bacteria that can convert toxic hydrogen sulphides and methane into energy," Christensen wrote. "These are unique habitats with endemic species that can be found nowhere else on Earth, including ones that have yet to be scientifically described."

Deep-sea species like sponges, stony corals, sea pens, sea fans, lace corals, and black corals are also particularly vulnerable because they grow slowly, mature late, reproduce infrequently, and live for a long time. The habitats they form are therefore classified as Vulnerable Marine Ecosystems. Mining would disturb these ecosystems directly as "underwater robots" would both damage and remove them in the hunt for metals.

However, the impacts of deep-sea mining extend beyond the seabed and included sediment plumes, the release of toxins, the alternation of the substrate and its geochemistry, noise and light pollution, and moving some organisms from one part of the sea to another. These could harm both marine and human communities, as unique conditions in the Arctic Ocean create a spring phytoplankton bloom that feeds important fisheries like herring, mackerel, and blue whiting. The area also draws migrating seabirds and several species of marine mammals.

In particular, 12 species of marine mammals are commonly found in the area slated for mining: minke whale, humpback whale, fin whale, blue whale, bowhead whale, northern bottlenose whale, sperm whale, orca, narwhal, white-beaked dolphin, harp seal, and hooded seal.

"Although it has long been documented that whales and dolphins live in this area, we still know remarkably little about their abundance, distribution, and behaviors, including how much they rely on healthy ecosystems around seamounts," Kirsten Young, a science lead at Greenpeace Research Laboratories at the University of Exeter, said in a statement. "Mining will cause permanent damage to those ecosystems and it will remain impossible to assess the full extent of those impacts, let alone control them."

"What is clear is that Norway's plans not only directly threaten species and habitats on the seabed, but also the wider marine ecosystem, from the tiniest plankton to the great whales," Young concluded.

Norway's plans also come as the region is already undergoing changes due to the burning of fossil fuels and the heating of the atmosphere and oceans.

A 2023 assessment of the ecosystems of the Norwegian Sea found that both water temperatures and ocean acidification had increased.

Acidification in particular is of "grave concern" in the sea because it is moving more quickly than the global average.

"As the waters of the Nordic Seas become more acidified, there will be impacts to species, ecosystems, and ecosystem functioning as a result of changes to organisms' structure, distribution, and ability to function," Greenpeace wrote.

Greenpeace is calling on Norway to abandon its plans for deep-sea mining and add its name to a list of countries backing a moratorium on the practice.

In addition, the group urges Norway to instead facilitate more scientific research in its Arctic waters and to protect a network of 30% of them by 2030 in keeping with the Kunming-Montreal Global Biodiversity Framework and work with other nations to preserve all marine environments under the global ocean treaty.

"Now, when six of the nine planetary boundaries have been exceeded, is not the time to be opening up a new frontier to extraction, but one when we should all be doubling down on doing what is needed to safeguard the wildlife and ecosystems that we share this wonderful blue planet with," Christensen said.