Agriculture is responsible for 90% of all ammonia pollution in Europe, a considerable part of which comes from cattle manure management: a new study shows what steps to take to reduce this pollution.Improved barn design, cleaning processes, and manure treatment could reduce ammonia emissions from commercial dairy cattle barns by 17 to 50%, according to a new study published in the journal Science of the Total Environment. The study provides a list of techniques and technologies that could provide the greatest reductions in ammonia emissions.