Explanation

Chlorofluorocarbons (CFCs) are historically and scientifically recognized as the primary culprits for ozone layer depletion. Carbon Dioxide is a greenhouse gas but not the main culprit for ozone damage. Nitrous Oxide can contribute to stratospheric ozone depletion, but CFCs are considered the most significant historical/primary culprit mentioned in this context. Carbon Monoxide does not significantly deplete the ozone layer.