New Greenpeace Report Warns of ‘Irreversible Harm’ from Deep Sea Mining

July 2, 2019

Photo: Greenpeace/Gavin Newman

Washington, DC, July 2, 2019 — The world’s oceans could face severe and irreversible harm unless tighter environmental safeguards are put in place to protect them from the risks of deep sea mining, warns a new report, In Deep Water, released today by Greenpeace International. Shining a light on this emerging threat, the report reveals that the deep sea mining industry is aware that their activities could result in the extinction of unique species. It also calls on governments to agree on a strong Global Ocean Treaty at the United Nations that puts conservation, not exploitation, at the heart of ocean governance.  

The health of our oceans is closely linked to our own survival. Unless we act now to protect them, deep sea mining could have devastating consequences for marine life and humankind,” says Louisa Casson, of Greenpeace’s Protect the Oceans campaign. “The deep sea is the largest ecosystem on the planet and home to unique creatures that we barely understand. This greedy industry could destroy wonders of the deep ocean before we even have a chance to study them.” To date, around only 0.0001% of the deep seafloor has been explored or sampled by scientists.

The Greenpeace report cites scientists, governments, environmentalists and representatives of the fishing industry, who warn of the inevitable threats to marine life across vast areas of the world’s oceans from mining machinery and toxic pollution if governments allow deep sea mining to begin. The report also explains how deep sea mining could make the climate emergency worse by disrupting ‘blue carbon’ stores in seafloor sediments.  

Although commercial deep sea mining has not yet begun, 29 exploration licenses have been granted to countries including China, Korea, the UK, France, Germany and Russia, who have laid claim to vast areas of the Pacific, Atlantic and Indian Oceans, covering an area of around 1 million km2 – almost two times the surface area of Spain. The American weapons giant Lockheed Martin’s subsidiary has two exploration licences sponsored by the UK. 

The report also highlights the weakness of current fragmented ocean governance, with the International Seabed Authority (ISA), the UN body responsible for regulating the deep sea mining industry, prioritising corporate interests above robust marine protection.  

“The ISA is not fit for purpose to protect our oceans. It is more concerned with promoting the interests of the deep sea mining industry and lobbying against a strong Global Ocean Treaty,” says Louisa Casson.

“It is critical that governments agree on a UN treaty strong enough to pave the way for the creation of a network of ocean sanctuaries that will be off-limits to all forms of industrial exploitation, including deep sea mining. It also needs to enforce much higher environmental standards for any such activity outside of these sanctuaries.” 

Publication of the In Too Deep report comes as the Greenpeace ship, Esperanza, is en route to the mid-Atlantic, where it will conduct new research at the Lost City, a spectacular formation of actively venting hydrothermal chimneys which tower above the seafloor and may hold clues to the evolution of life. Despite being identified by UNESCO as meeting World Heritage status, the Lost City is under threat after it was included in an area of the Mid-Atlantic Ridge covered by a deep-sea mining exploration contract granted by the ISA to the Polish government in February 2018. 


Photos of deep sea marine life can be downloaded here


[1] Download the In Deep Water: the emerging threat of deep sea mining report here

[2] Pole to Pole Expedition: Greenpeace is sailing from the Arctic to the Antarctic, undertaking research and investigations to highlight threats facing the oceans and to campaign for a Global Ocean Treaty covering all seas outside of national waters. Map of the ‘Pole to Pole’ route. See contacts below for expedition enquiries, including for media interested in joining the ship on-board. 

[3] Greenpeace and scientists are calling for a Treaty that can create a network of ocean sanctuaries covering at least a third of the global oceans by 2030. For more information see Protect the Global Oceans: Why We Need a Global Ocean Treaty. The second of four rounds of negotiation at the UN towards a treaty covering international waters took place in March and April this year. The third round of negotiations will take place at the United Nations in New York in August 2019, with the treaty process set to conclude with a fourth and final round in the first half of 2020.

[4] Louisa Casson is an oceans campaigner at Greenpeace UK.


Julia Zanolli, Global Media Lead for the Protect the Oceans campaign, Greenpeace UK: [email protected], +44 07971 769107

Crystal Mojica, Senior Communications Specialist, Greenpeace USA: [email protected], 646-530-1581

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