The incorporation of FU amino acids associated with a decrease in crude protein content of diets contributes to reducing the impacts of pig production on climate change, acidification and eutrophication. As for current pig feeding practices in France, there is still a major potential to reduce environmental impacts at low cost, especially for acidification (17.8%), eutrophication (12.5%) and climate change (1.3%). Indeed, the incorporation of recently available FU amino acids such as tryptophan and valine in pig feeds together with multiphase feeding allows a further reduction of the impacts relatively to the current practices. The underlying mechanisms affect various stages of the production chain such as feed production, animal housing and manure management. They include the substitution of soybean meal and extruded soybean by cereals and FU amino acids and the reduction of nitrogen excretion which further reduces nitrous oxide and ammonia emissions. The incorporation of FU amino acids together with multiphase feeding appears to be a win win strategy because it allows mitigation of several impacts.