Memo to NASA: finish what you start.

792 GDP accounting is an indicator of the size of an economy, not necessarily of human welfare (9), and has been overlooked as an indicator of biodiversity loss. BRIAN CZECH,1 DAVID L.TRAUGER,1 JOSHUA FARLEY,2 ROBERT COSTANZA,2 HERMAN E. DALY,3 CHARLES A. S. HALL,4 REED F. NOSS,5 LISI KRALL,6 PAUL R. KRAUSMAN7 1Department of Fisheries and Wildlife Sciences,Virginia Polytechnic Institute and State University, National Capital Region, Alexandria, VA 22314, USA. 2Gund Institute for Ecological Economics, University of Vermont, Burlington,VT 05405–1708, USA. 3School of Public Policy, University of Maryland, College Park, MD 20722, USA. 4College of Environmental Science and Forestry, State University of New York, Syracuse, Syracuse, NY 13210, USA. 5Department of Biology, University of Central Florida, Orlando, FL 32816, USA. 6Economics Department, State University of New York, Cortland, Cortland, NY 13045, USA. 7School of Natural Resources,University of Arizona,Tucson,AZ 85721,USA.