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'''Carbon dioxide''' is exhaled when you breathe out. 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]].
'''Carbon dioxide''' is exhaled when you breathe out.
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]].