On May 3, the Chesapeake Bay Commission released Nutrient Credit Trading for the Chesapeake Bay: An Economic Study by RTI International. The study reports that nutrient trading could produce a potential cost savings of 20% to 80%, depending on implementation parameters. The highest cost savings reported are achieved through a watershed-wide program that allows urban stormwater systems to swap with farmers, as agricultural best management practices offer lower cost options. The report also recommends government-defined rules and enforcement, as well as technical assistance and information, in order to actually deliver on pollution reductions.