Table 2. Possible measures for decreasing the phosphorus input to the Baltic Sea.

Measure	Area	Tonnes/year
Sewage treatment	Poland	5,332
Sewage treatment	Russia	3,844
Sewage treatment	Belarus	1,984
Sewage treatment	Baltic States	992
Sewage treatment	Czech Rep.	372
Phosphate-free detergents*	All	3,100
Agriculture	All	5,600
Rural sewage treatment	Sweden	175
Mussel cultivation	Sweden	35
Dams	Sweden	10
Protective zones	Sweden	7.5
Wetlands	Sweden	4.3
Soil drainage	Sweden	2.6

^*In combination with sewage treatment.

Swedish examples are from [18] and the other examples emanate from [27].