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CO<sub>2</sub> is one of the so-called [[greenhouse gas]]es.  Heat-trapping by CO<sub>2</sub> has been observed on [[Earth]] and [[Venus]].  The extent of its role in the current increase in average global temperatures is a topic of active political and scientific debate. Rising CO<sub>2</sub> levels have also been attributed to the acidification of the world's oceans.  
 
CO<sub>2</sub> is one of the so-called [[greenhouse gas]]es.  Heat-trapping by CO<sub>2</sub> has been observed on [[Earth]] and [[Venus]].  The extent of its role in the current increase in average global temperatures is a topic of active political and scientific debate. Rising CO<sub>2</sub> levels have also been attributed to the acidification of the world's oceans.  
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The Lewis structure indicates it has two double bonds:
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The [[Lewis structure]] indicates it has two double bonds:
    
[[Image:CO2.gif]]
 
[[Image:CO2.gif]]
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