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. |