How do HFC refrigerants differ from CFCs?

HFCs, or hydrofluorocarbons, are significant because they do not contain chlorine and, therefore, do not deplete the ozone layer, which is a critical distinction from CFCs (chlorofluorocarbons). This makes HFCs a preferred choice for many applications when considering ozone layer protection. However, it is important to note that HFCs can have a high global warming potential, which raises environmental concerns regarding their contribution to climate change.

The correct answer highlights this important characteristic of HFCs, contrasting them with CFCs, which are known for their ozone-depleting effects. While HFCs are an improvement over CFCs in terms of ozone protection, it's essential to be aware of their potential environmental impact due to greenhouse gas effects. This understanding is critical in the context of refrigerants and their regulation under international agreements aimed at reducing substances that cause ozone depletion and contribute to global warming.

Recognizing this distinction helps in choosing refrigerants that balance environmental impact and operational efficiency effectively.