1. More than two thirds of the emissions of important pollutants into German waters come from so called "fugitive sources", following a study of the Fraunhofer Institute for Systems and Innovation Research (ISI). The scientists, jointly with their colleagues of the Karlsruhe University, elaborated the first survey on emissions of important pollutants into German waters on behalf of the Federal Environment Ministry and the Federal Environmental Agency. The researches summed up all the emissions from the industry, the municipalities as well as several fugitive emissions into rivers and lakes, such as erosion or groundwater. The period of examination has been 1993 to 1997.