The relatively stable humus material that is produced from a composting process in which bacteria in soil mixed with garbage and degradable trash break down the mixture into organic fertilizer. (from EPA)
Heartland Green Sheets (A Research Project of the School of Architecture and Urban Design at the University of Kansas), Funding is provided by the Mid-America Regional Council Solid Waste Management District, the Missouri Department of Natural Resources and the Kansas City Design Center, USA 2002. http://heartlandgreensheets.org/glossary.html (from Office of Communications, Education and Public Affairs OCEPA - US Environmental Protection Agency - http://www.epa.gov/OCEPAterms/aarz.html), (Envir Hlth and Sfty - Amer) {639}