Outdoor Air 1 : Air as typically comprising by volume. (ai) oxygen 20.94 percent (b) carbon dioxide 0.03 percent (c) nitrogen and other inert gases 79.03 percent
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}