Which statement is true regarding chlorofluorocarbons (CFCs) and their presence in the atmosphere?

Chlorofluorocarbons (CFCs) are synthetic compounds that have been primarily used as refrigerants, propellants, and solvents. Their significance in environmental science largely revolves around their detrimental impact on the ozone layer. When CFCs are released into the atmosphere, they eventually rise up to the stratosphere where ultraviolet radiation breaks them down, releasing chlorine atoms. These chlorine atoms can then react with ozone (O3) molecules, leading to the depletion of the ozone layer, which is essential for protecting living organisms from harmful ultraviolet radiation.

This understanding underscores the pivotal role that CFCs play in the degradation of the ozone layer, making the statement regarding their role in stratospheric ozone decomposition true. Their harmful effects have led to international agreements, such as the Montreal Protocol, aimed at phasing out their production and usage due to their impact on the atmosphere and climate.