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| You are subscribed to It All Starts With Science Blog for U.S. Environmental Protection Agency. This information has recently been updated, and is now available. 03/22/2013 10:34 AM EDT By Ronald Williams What's in our air? It's made up of 78 percent nitrogen, 21 percent oxygen, and one percent other gases such as carbon dioxide. An even smaller contribution comes from gaseous air pollutants such as ozone or carbon monoxide. In addition to the gases, air contains tiny particles from both natural and man-made [...]
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