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impacts of crude oil in marine environments are likely not directly transferable to the impacts resulting from produced water. On that basis, research into the environmental impacts of produced water itself is expanding. Many of the same challenges relating to the identification of eco-
Discharge of grey water from ships is today unregulated in most sea areas, including the Baltic Sea. Annually, an estimated 5.5 million m 3 grey water is emitted to the Baltic Sea with largest contribution from RoPax (4.25 million m 3) and cruise ships (0.65 million m 3).In total 44 different contaminants in grey water was identified and sorted into the sub categories organic compounds (28
