The air we breathe in the lower atmosphere is not primarily composed of oxygen. Instead it contains 78% nitrogen, 21% oxygen and less than 1% gases like argon and carbon dioxide.
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5/15/2013 Board of Directors Special Budget Hearing 5/15/2013 Board of Directors Regular Meeting More Information: Budget Agenda (70 kb PDF, 9 pgs) Board Agenda (1 mb PDF, 211 pgs)
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