Is deep-sea mining a cure for the climate crisis or a curse?

Trillions of polymetallic nodules litter Earth’s ocean floors. Each is rich in manganese, nickel, cobalt and copper; some of the most important metals for manufacturing low carbon technology.

Mining companies claim the nodules are desperately needed to manufacture the technology to lower carbon emissions, and to prevent significant environmental impact on land.

Researchers state that mining deep-sea nodules would be catastrophic for oceans. Ocean biodiversity would be obliterated by dredging, and plumes of sediments, laced with toxic metals, would be sent spiralling upwards to poison marine food-chains.