phosphate phosphorus eu-27 european sustainable phosphorus platform eu kimo van dijk reduction nutrient management sustainable use food europe transistion food systems scenario analyses van dijk montpellier phosphorus in soils and plants conference sustainable phosphorus summit 2014 sps psp donutss recovery reuse resource scarcity recycling circular economy struvite livestock ash waste sector sewage sludge meat and bone meal crops fertilizer fertiliser espp policy sustainable development agriculture food processing mining manure biowaste interdisciplinary science eco duurzaamheid stadslandbouw arnhem permacultuur p imbalance austria p-imbalance iiasa globiom p-rock eurostat monitoring time series material flow analyses 2nd european sustainable phosphorus conference data phosphorus flow analyses berlin jrc germany phosphorus balance material system analyses substance flow analyses european environmental agency sound data alliance uncertainty ottavia zoboli
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