The dairy industry is facing major challenges, among which the need to reduce greenhouse gases and nitrogen emissions. The cows at the Dairy Campus in Leeuwarden are monitored 24/7 by sensors, trackers and cameras. The animals generate data on nutrition, welfare, milk, grazing, biodiversity, manure and urine. Thanks to this research, a feed additive has been developed that reduces methane emissions by up to 40%. Step by step, the WUR researchers are unravelling the secrets of the cow in the search to find yet more solutions.