Chemical refrigerants used in refrigeration and air conditioning are primarily hydrofluorocarbons (HFCs), a type of F-gas (fluorinated greenhouse gas). HFCs and other F-gases are powerful greenhouse gases that have a much greater warming effect than carbon dioxide, but are not as prevalent and stay in the atmosphere for a shorter amount of time. Read this FAQ to learn how to simulate F-gas reductions in En-ROADS: How do I reduce F-gas emissions, simulating policies like the Kigali Amendment of the Montreal Protocol or a similar policy?