[Feeding and environment. We can do more [swine]]

alimentation des animaux alimentazione zootecnica animal feeding animal nutrition azote azoto cerdo contaminantes diet dieta environmental impact environmental protection faeces feces feci feed conversion efficiency feeding systems fosforo heces impact sur l'environnement impacto ambiental impatto ambientale inquinamento agricolo inquinanti nitrogen nutrition animale nutrizione animale phosphore phosphorus polluant pollutants pollution by agriculture pollution par l'agriculture porcin protection de l'environnement protezione dell'ambiente raciones ration rations razioni residues residui residuos sistemi di alimentazione swine technique d'alimentation