NEAD was created and is maintained by the Center for Environmental Policy. The first version of NEAD was produced in 2006 and contains complete syntheses for 134 countries for the year 2000. The most recent update was produced in 2012 and added data for 2004 and 2008. This update was made possible by a grant from the International Society for the Advancement of Emergy Research (ISAER). This grant also supported the creation of this website for retrieving and viewing the data.