Which refrigerants are known for having a high ozone-depletion potential?

CFCs, or chlorofluorocarbons, are known for their high ozone-depletion potential because they contain chlorine atoms, which are released into the atmosphere when CFCs break down. The chlorine can react with ozone (O3) in the stratosphere, leading to significant depletion of the ozone layer. This destruction of ozone allows more harmful ultraviolet (UV) radiation to reach the Earth's surface, contributing to environmental issues such as increased skin cancer rates and other ecological impacts.

In contrast, HFCs (hydrofluorocarbons) and HFOs (hydrofluoroolefins) do not contain chlorine and have a negligible impact on ozone depletion; they are considered ozone-safe. HCFCs (hydrochlorofluorocarbons) do pose some risk to the ozone layer due to their chlorine content, but their potential for damage is significantly lower than that of CFCs. This understanding is crucial for technicians in the field to navigate the regulations regarding refrigerants and to make environmentally responsible choices.