What types of gases are classified as F-Gases?

The classification of F-Gases specifically includes hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). These gases are recognized for their use in refrigeration, air conditioning, insulation foams, and aerosol propellants, among other applications. F-Gases are known for their high global warming potential (GWP), which is why they are subject to regulation and phasedown efforts under international agreements such as the Kyoto Protocol and the Kigali Amendment.

In contrast, the other options do not align with the definition of F-Gases. The second choice includes greenhouse gases like methane, carbon dioxide, and nitrous oxide; however, these are not categorized as F-Gases. The choice concerning chlorofluorocarbons (CFCs) and hydrocarbons is also incorrect, as CFCs are part of a different group of substances that are now largely phased out due to their ozone-depleting properties. Lastly, noble gases and helium are chemically inert and do not possess the properties that qualify them as F-Gases. Therefore, the correct identification of F-Gases as listed ensures a clear understanding of their classification and relevance in environmental discussions.