Simple Asphyxiant 3 : Generally, an inert gas that displaces the oxygen necessary for breathing, and dilutes the oxygen concentration below the level that is useful for the human body
Emergency Response to Terrorism: Self-Study, Glossary, Administrative Office-SCSC (U. S. Department of Justice, Office of Justice Programs - Bureau of Justice Assistance, Federal Emergency Management Agency FEMA, United States Fire Administration - National Fire Academy), Emmitsburg, MD, USA 1997. https://www.ncjrs.gov/pdffiles1/Photocopy/189722NC JRS.pdf, (Teror - Amer) {931}
