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In page Hotspot Ecosystem Research and Man's Impact On European Seas:

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However, the deep sea is increasingly threatened by humans: most of this deep-ocean frontier lies within Europe's Exclusive Economic Zone (EEZ) and has significant potential for the exploitation of biological, energy, and mineral resources. Research and exploration over the last two decades has shown clear signs of direct and indirect anthropogenic impacts in the deep sea, resulting from such activities as overfishing,[3] littering and pollution. This raises concerns because deep-sea processes and ecosystems are not only important for the marine web of life, but also fundamentally contribute to the global biogeochemical cycle.[citation needed]