“Wetlands for clear water” was the headline of a seminar organized March 24th – 25th, in Greifswald Germany by Grune Liga and University of Greifswald. Over 40 participants from Germany, Poland, Lithuania, Estonia and other European countries (Romania, Turkey) could follow 12 lectures on creation, restoration and utilization of wetlands as nutrients’ traps for the diffuse sources of water pollution (mostly from agriculture). The seminar addressed the question how the proper wetland management can contribute to the goal of reducing nutrient loads and eutrophication of Baltic Sea.