The material flows database complements existing EPA data in four ways. Use as well as wastes . Much of current data covers outputs, that is emissions and wastes. The material flows database focuses on materials used by the economy and the intensity and efficiency of that use. All stages of materials cycle .
Many current data relate to production and power generation facilities.
The material flows database is built on the assumption that the potential for environmental impacts exists when any materials enter or leave the economy. The database will track materials extracted, processed, used or escaping as wastes or emissions. It will cover material in products as well as in wastes and emissions at all stages of the materials cycle. Broader categories and ecological damage . The material flows database will cover about 50 major materials and characterize them by the speed with which they move through the economy and their mobilization and behavior in the environment Action by economic sectors and national economies .