It's definitively interesting to know pathways and sources of nutrient pollution. Where are the hotspots? Wich are the main sources? A very very complex issue. So it is quite important to publish easily comprehensible graphics as posted above.

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It's definitively interesting to know pathways and sources of nutrient pollution. Where are the hotspots? Wich are the main sources? A very very complex issue. So it is quite important to publish easily comprehensible graphics as posted above.