The project is designed to : develop economic and ecological criteria which can be applied to determine the costs of various kinds of marine pollution; develop mathematical equations which can be applied in economic submodels for the cost determination of environmental impacts. Four cases of marine pollution are considered : discharge of dangerous chemical substances (black list); oil dumping; increasing concentration of faecal/pathogenic bacteria as a result of the direct discharges of waste water into coastal waters; eutrophication with resultant algal growth.