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The carbon dioxide molecule is a chemical compound composed of a carbon atom and two atoms of oxygen.  Often it is referred to by its formula CO2.  It is present in the atmosphere of the [[Earth]] in a low concentration and acts as a gas "greenhouse" by allowing ultraviolet radiation through, but trapping heat in.  In its solid state, is called [[dry ice]].  It is a great component of the [[carbon cycle]].

The '''carbon dioxide''' molecule is a chemical compound composed of a carbon atom and two atoms of oxygen.  Often it is referred to by its formula CO2.  It is present in the atmosphere of the [[Earth]] in a low concentration and acts as a gas "greenhouse" by allowing ultraviolet radiation through, but trapping heat in.  In its solid state, is called [[dry ice]].  It is a great component of the [[carbon cycle]].