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2 bytes removed ,  19:24, April 6, 2007
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move up simpler stuff
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'''Carbon dioxide''' is exhaled when you breathe out.   
 
'''Carbon dioxide''' is exhaled when you breathe out.   
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It is a [[molecular]] substance with a formula CO<sub>2</sub>. 
   
It is used by plants in the process of [[photosynthesis]] to generate [[oxygen]].
 
It is used by plants in the process of [[photosynthesis]] to generate [[oxygen]].
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It is a [[molecular]] substance with a formula CO<sub>2</sub>.
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