Gren, Ing-Marie; Jannke, Paul; Elofsson, Katarina - In: Environmental & Resource Economics 10 (1997) 4, pp. 341-362
Due to eutrophication caused by heavy loads of nitrogen and phosphorus, the biological conditions of the Baltic Sea … have been disturbed: large sea bottom areas without any biological life, low stocks of cods, and toxic blue green algaes …. It is recognized that the nitrogen and phosphorus loads to the Baltic Sea must be reduced by 50% in order to restore the …