The Stocks and Flows (STAF) Project evaluates both current and historical stocks and flows of technologically significant materials throughout nine world regions.The STAF project goes further than mere calculation of various reservoirs and flows, integrating its metal cycles with environmental data to assess environmental and policy implications. 

       Drawing largely upon mineralogical and geological records,  economic data, industrial association publications, and environmental reports, the STAF team has completely characterized the copper, zinc and silver cycle for relevant countries throughout the world. Current cycle analyses focus on nickel, tin, chromium, tungsten and various steels. STAF researchers apply their knowledgable models of our resource use, predicting several future technological development scenarios and their environmental and economic impacts.