Fig. 13. Estimated inputs, outputs, and change in storage of phosphorus on agricultural lands in developing and developed countries measured in Tetragrams per year. Inputs include fertilizers and manure; outputs are runoff and crops harvested. Note that the drop in fertilizer use in the industrial countries in 1996 may be because of greatly reduced use in the former Soviet Union and Eastern Europe (Bennett et al. 2001). From "Ecosystems and Human Well-being: Scenarios, Volume 2" by Steve R. Carpenter, et al., eds. Copyright (c) 2005 Millennium Ecosystem Assessment. Reproduced by permission of Island Press, Washington, D.C.