What is one potential disadvantage of using refrigerants that contain chlorine?

Refrigerants that contain chlorine are known to contribute significantly to ozone layer depletion. When these substances are released into the atmosphere, they can break down ozone molecules, which play a crucial role in protecting the Earth from harmful ultraviolet (UV) radiation. The chlorine atoms from these refrigerants are particularly effective at destroying ozone, making their use a serious environmental concern.

This impact has led to stringent regulations and the phase-out of many chlorinated refrigerants, such as chlorofluorocarbons (CFCs), under agreements like the Montreal Protocol. While considerations about cost, effectiveness, and global warming potential are also important when selecting refrigerants, the ability of chlorine-containing compounds to damage the ozone layer is a uniquely critical issue that necessitates careful management and alternatives.