What is correct about the destruction of ozone by CFCs?

The correct answer emphasizes that the decay products of chlorofluorocarbons (CFCs) play a significant role in the destruction of ozone in the stratosphere. When CFCs are released into the atmosphere, they eventually rise to the stratosphere, where they are subjected to ultraviolet (UV) radiation. This radiation breaks down CFCs, releasing chlorine atoms.

These free chlorine atoms are highly reactive and can engage in a series of chemical reactions that lead to the depletion of ozone molecules. Each chlorine atom can facilitate the destruction of many ozone molecules before it is removed from the atmosphere. This process is a well-documented environmental concern because it leads to the thinning of the ozone layer, which is essential for protecting life on Earth from harmful UV radiation.

The other options do not accurately reflect the mechanisms involved in ozone depletion. While CFCs do contribute to ozone destruction primarily through their breakdown products, stating that CFCs directly destroy ozone oversimplifies the process. Additionally, indicating that CFCs and their decay products have no impact on ozone levels is factually incorrect, as it contradicts extensive scientific research demonstrating their detrimental effects on the ozone layer.