Air is to breathe .....

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Where does air come from?

Air is to breathe .....

Air is an invisible, odorless gas that consists of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon and 0.03 percent of carbon dioxide. Air also contains traces of helium, neon, methane, nitrous oxide, krypton (though not enough for SuperMan) and xenon.
A cubic yard of air weighs more than two pounds at sea level, so air isn't as light as people tend to think it is!



3/14/2007 5:46:53 PM
Indicolts54 said:

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