How much nitrogen from fertiliser has accumulated in the groundwater of rivers around the world?

To obtain the relevant data, the scientists used a high-resolution model called IMAGE-GNM, which has the ability to reproduce the geochemical cycles of nutrients. Thus, the analysis showed that all the studied river basins have accumulated a significant amount of nitrogen, and if in the Rhine it was 1.8 million tonnes, for the Mississippi, in turn, this figure reached already 32 million.