Oil pollution Marine pollution 3 Eutrophication 2 Heavy metal pollution 2 Radio active pollution 2 Radioactivity 2 Aerosol accumulation 1 Bioaccumulation 1 Biomagnification 1 Biopollutants 1 Biphenyles 1 Cost benefit analysis 1 Dredgings 1 History 1 Hydrocarbons pollution 1 Metals 1 Oil pollution of the sea 1 Oil spills 1 Pathogens, Water borne 1 Petroleum 1 Plastics 1 Polychlorinated Biphenyles 1 Prevention 1 Radioactive pollution 1 Soil pollution 1 Standards, water quality 1 Waste water treatment 1 Water quality standards 1 ozone depletion 1