* Linear Structure: CO2 has a linear structure, with the carbon atom in the center and the two oxygen atoms on either side.

* Symmetry: The molecule is symmetrical, meaning the two oxygen atoms are positioned equally on opposite sides of the carbon atom.

* Electronegativity: Oxygen is more electronegative than carbon, meaning it attracts electrons more strongly. However, the symmetrical structure of CO2 cancels out the individual dipole moments of the C-O bonds. The opposing dipoles cancel each other out, resulting in a net dipole moment of zero.

Therefore, CO2 is nonpolar.