Do chlorofluorocarbons (CFCs) increase the amount of ozone in the atmosphere?

Chlorofluorocarbons (CFCs) do not increase the amount of ozone in the atmosphere; rather, they contribute to ozone depletion. CFCs are synthetic compounds previously used in refrigeration, aerosol sprays, and other applications. When CFCs are released into the atmosphere, they eventually reach the stratosphere, where they are broken down by ultraviolet (UV) radiation, releasing chlorine atoms. These chlorine atoms catalyze the destruction of ozone (O3) in the stratosphere, leading to a decrease in the concentration of ozone.

The role of ozone is crucial, as it forms a protective layer in the Earth's stratosphere that absorbs the majority of the sun's harmful ultraviolet radiation. A decrease in ozone levels can lead to increased UV radiation reaching the Earth's surface, which is associated with various harmful effects, including increased risks of skin cancer and other health issues, as well as negative impacts on ecosystems.

Therefore, the correct understanding is that CFCs do not increase ozone levels; they instead contribute to the reduction of ozone in the atmosphere, making the correct answer false.