Polymetallic Nodules Found in Deep Sea Mining Contain Essential Minerals for Manufacturing Electric Vehicle Batteries, Solar Panels, and Wind Turbines.
Deep Sea Mining, a practice under consideration for obtaining vital minerals for the energy transition and the future of electric vehicles, is currently under critical scrutiny from the global community. This growing sector presents considerable potential for the clean energy industry, however, it also raises concerning questions about environmental impact.
Three Key Minerals Needed to Manufacture Clean Energy Technologies Are Found on the Ocean Floor
On the ocean floor, cobalt, nickel, and copper can be found, three of the key minerals necessary for manufacturing the main technologies involved in electric cars.
Cobalt is crucial in the manufacture of lithium-ion batteries, widely used in electric vehicles and energy storage systems. The mineral enhances the energy efficiency of these batteries, allowing them to store and release energy more effectively.
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Nickel is another important component for electric vehicle batteries. It helps to increase the energy density of the batteries, allowing them to store more energy in a smaller space. This is especially important for electric vehicles, as more efficient batteries mean greater range.
Meanwhile, copper is an excellent conductor of electricity and heat, making it essential in the manufacture of cables and wires for renewable energy systems and electric vehicles. Additionally, it is extensively used in the production of electric motors and solar panels.
Impact of Submarine Mining on the Energy Transition
At the forefront of this discussion is the International Seabed Authority (ISA), an entity governed by the UN, that oversees mineral exploration in international waters. A recent three-week meeting with representatives from ISA member countries, held in Kingston, Jamaica, highlighted the crucial role of minerals extracted from the ocean floor – such as cobalt, nickel, and copper – in the energy transition.
A notable case is that of the tiny Pacific island of Nauru, which recently revealed plans to extract polymetallic nodules from the ocean floor. These nodules contain essential minerals for the production of electric vehicle batteries and renewable energy equipment, such as solar panels and wind turbines. The scale of this deposit is impressive, with nodules estimated at around 340 million tons of nickel – three times the amount of known global land reserves.
The Environmental Impact of Deep Sea Mining
However, the deep sea mining sector is shrouded in contradictions. The same process that facilitates the transition to clean energy also has the potential to cause substantial environmental damage. The International Energy Agency (IEA) estimates that global demand for minerals will quadruple by 2040, driven by efforts to meet the Paris Climate Agreement. This could potentially exacerbate pressure on marine ecosystems.
Submarine mining could have a devastating impact on marine life, with the oceans producing half of the oxygen needed for human life, as well as capturing a significant portion of global carbon dioxide emissions. In contrast, companies involved in submarine mining argue that this method has a smaller carbon footprint and causes less human impact.
Enrico Marone, a spokesperson for Greenpeace Brazil, argues that the industry needs to improve the efficiency of the equipment that uses these minerals, instead of seeking new frontiers for exploration.
The Need for Environmental Protection
In the past two years, nearly 200 countries and several major companies, including BMW, Volvo, Google, and Samsung, have signed a declaration calling for a suspension of mining in international waters. Additionally, some banks have created policies to exclude financing for offshore mining.
Despite environmental concerns, progress continues in other parts of the world. Norway recently opened areas in the Greenland Sea, the Norwegian Sea, and the Barents Sea for mining licenses. The Minister of Petroleum and Energy, Terje Aasland, stated: “We need minerals to succeed in the green transition.”
The debate over deep sea mining is far from over. The need to balance the requirements of the energy transition with environmental protection will shape future discussions and decisions. Whatever the outcome, it is clear that submarine mining will be a vital part of the emerging energy landscape.
Brazil Supports 10-Year Suspension on Offshore Mining
The recent decision of the Brazilian government regarding deep sea mining has gained prominence on the international stage. This choice positions Brazil alongside other countries, such as Canada, France, and Chile, advocating for a preventive 10-year pause on offshore mining. The motivation behind this suspension primarily stems from uncertainties about the environmental impacts of this practice.
According to information from the portal O Globo, at a recent meeting of the International Seabed Authority (ISA), under the auspices of the UN, Brazilian Ambassador Elza Moreira Marcelino de Castro expressed that Brazil supports a suspension on deep sea mining for a period of ten years. She stated that, in her view, the current level of understanding and scientific advancements are insufficient to ensure the approval of offshore mining projects beyond national jurisdiction.
The proposed international moratorium, if adopted, would prevent offshore mining for a decade, if the ISA fails to reach consensus on general standards for the activity on a global scale.

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