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move up "double bonds"
[[Image:CO2.gif|thumb|left|150px|The bonds of Carbon Dioxide]]
[[Image:CO2.gif|thumb|left|150px|The bonds of Carbon Dioxide]]
'''Carbon dioxide''' (CO<sub>2</sub>) is an odorless, colorless [[gas]] formed by the [[oxidation]] of [[hydrocarbon]]s, both naturally, in animals, and artificially, as fuel<ref>If not enough oxygen is present, [[carbon monoxide]] will also be produced, in a process called [[incomplete combustion]].</ref>. It is the second simplest oxycarbon, after [[Carbon Monoxide]]. The structure of Carbon Dioxide is that of a single carbon atom, double bonded to two oxygen atoms. It is one of the [[human]] body's major waste products, being excreted through exhalation (breathing).
'''Carbon dioxide''' (CO<sub>2</sub>) is an odorless, colorless [[gas]] formed by the [[oxidation]] of [[hydrocarbon]]s, both naturally, in animals, and artificially, as fuel<ref>If not enough oxygen is present, [[carbon monoxide]] will also be produced, in a process called [[incomplete combustion]].</ref>. It is the second simplest oxycarbon, after [[Carbon Monoxide]]. The structure of Carbon Dioxide is that of a single carbon atom, double bonded to two oxygen atoms.
The [[Lewis structure]] indicates it has two double bonds,
It is one of the [[human]] body's major waste products, being excreted through exhalation (breathing).
It is used by [[plants]] in the process of [[photosynthesis]] to create complex carbohydrates ([[cellulose]] and [[sugar]]s), using water and the [[energy]] from [[sunlight]]. The waste product in this process is [[oxygen]].
It is used by [[plants]] in the process of [[photosynthesis]] to create complex carbohydrates ([[cellulose]] and [[sugar]]s), using water and the [[energy]] from [[sunlight]]. The waste product in this process is [[oxygen]].
CO<sub>2</sub> is one of the [[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 in the atmosphere have been observed to promote acidification of the oceans, through CO<sub>2</sub> + H<sub>2</sub>O => H2CO3
CO<sub>2</sub> is one of the [[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 in the atmosphere have been observed to promote acidification of the oceans, through CO<sub>2</sub> + H<sub>2</sub>O => H2CO3
==Carbon Dioxide and Atmospheric Temperature==
==Carbon Dioxide and Atmospheric Temperature==