Hydrofluorocarbons (HFCs) are a group of synthetic compounds primarily used as refrigerants in air conditioning and refrigeration systems. They are known for their ability to efficiently transfer heat and are often used as substitutes for ozone-depleting substances like chlorofluorocarbons (CFCs). While HFCs do not harm the ozone layer, they are potent greenhouse gases that contribute to global warming. Their global warming potential is significantly higher than that of carbon dioxide, leading to international efforts, such as the Montreal Protocol, to phase them out in favor of more environmentally friendly alternatives.