Hence, the aim of this study was to evaluate the environmental impacts of swine production in Brazil through the use of a complete LCA, comparing four manure management systems(MMS):liquid manure storage in slurry tanks (Sce.Ref) ;the biodigestor by flare (Sce.Flare);the biodigestor for energy purposes (Sce.CHP);and composting (Sce.Comp).