Environmental organisation Greenpeace International warns that the world’s oceans could face severe and irreversible harm from deep sea mining unless tighter environmental safeguards are put in place. A new report published by the organisation, titled ‘In Deep Water’, shines a light on the emerging threat, revealing that deep sea mining could contribute to the extinction of unique marine species, while only 0.0001% of the deep seafloor has been explored or sampled by scientists.