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Millennium Ecosystem Assessment
Uploaded on Tuesday 21 Feb 2012
Comparison of global river nitrogen export from natural ecosystems, agricultural systems, and sewage effluents, 1975 and 1990
Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Nutrient loading is projected to become an increasingly severe problem, particularly in developing countries. Nutrient loading already has major adverse effects on freshwater ecosystems and coastal regions in both industrial and developing countries.