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No change in size ,  14:56, April 9, 2007
invisible is silly; colorless is factual
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'''Carbon dioxide''' in an odorless, invisible [[gas]] formed by the [[combustion]] of [[hydrocarbon]]s, both nataurally, in the human body, and artificially, as fuel. It is one of the human body's major waste products, being excreted through exhalation.   
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'''Carbon dioxide''' in an odorless, colorless [[gas]] formed by the [[combustion]] of [[hydrocarbon]]s, both nataurally, in the human body, and artificially, as fuel. It is one of the human body's major waste products, being excreted through exhalation.   
 
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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