Pig farming can have a big impact on the environment, especially in terms of nitrogen and phosphorous emissions. The biggest environmental issues come from feed production, manure management, and methane emissions from the pigs. European pig systems rely heavily on soya in pig diets, which can have negative effects on the environment. Improvements in feed production and manure management are key to reducing the environmental impact of pig farming. Finding alternative protein sources to soya and implementing new manure management strategies, like producing biogas, can help make pig farming more sustainable. By making changes in these areas, we can work towards a more environmentally friendly pig farming system.