Gas mixtures in the atmosphere, which is composed of dry air at sea level contains (average) nitrogen, 78.09 percent oxygen by volume below 0.93 percent and 20.95 percent carbon dioxide, argon, 0.03 percent of the rest consists of other gases. Another in a small amount Amount of water vapor in the atmosphere is not constant, depending on weather conditions. The fresh air will be considered only if no other substances.Other animals or the environment.
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