HFCs or Hydrofluorocarbons are a group of synthetic compounds primarily used in refrigeration, air conditioning, and aerosol propellants. They are known for their ability to cool effectively and are often seen as alternatives to ozone-depleting substances like CFCs (chlorofluorocarbons). However, HFCs are potent greenhouse gases, contributing to global warming. Due to their environmental impact, many countries are working to phase out HFCs under international agreements such as the Montreal Protocol. Efforts are being made to find more sustainable alternatives that have a lower impact on the climate.