Oxygen

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Please copy/paste the following text to properly cite this HowStuffWorks article:

"Oxygen." 30 August 2007. HowStuffWorks.com. <http://reference.howstuffworks.com/oxygen-encyclopedia.htm> 05 July 2009.

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Oxygen is a life-supporting gas and a chemical element. Nearly all living things need oxygen to stay alive. Oxygen combines with other chemicals in plant and animal cells to produce energy needed for life processes. Oxygen is also needed to make most fuels burn. During the burning process, oxygen combines with the fuel in a chemical reaction. Heat is released during the burning process.

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Oxygen

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