Urea is a valuable nitrogen fertilizer which is regularly used in agriculture to fertilize large areas of arable land. However, the release of urea into the atmosphere extensively affects the environment and human health. These affects can be largely mitigated by the addition of “urease inhibitors”, which reduce gaseous ammonia losses. A team of researchers at the Technical University of Munich (TUM) has now calculated how the use of eco-efficient fertilizers can save billions in environmental and health expenditures.