Does ultraviolet radiation break down CFCs and free the chlorine ion?

Ultraviolet (UV) radiation does indeed play a critical role in the breakdown of chlorofluorocarbons (CFCs). When CFCs are released into the atmosphere, they can eventually reach the stratosphere, where UV radiation is intense. The energy from UV rays can cleave the carbon-chlorine bonds in CFC molecules, which leads to the release of chlorine atoms.

Once free, these chlorine atoms become highly reactive and can participate in chemical reactions that deplete ozone in the stratosphere. This process is significant due to its implications for stratospheric ozone levels, which protect the Earth from harmful ultraviolet radiation.

Consequently, the statement that ultraviolet radiation breaks down CFCs and frees the chlorine ion is accurate, as it highlights the direct effect UV light has on CFC molecules and the resultant environmental impact.