Final answer:
Clean agents are gases that do not conduct electricity or leave a residue and are nonvolatile. They are used in fire extinguishers to suppress fires by removing heat or reducing oxygen levels.
Step-by-step explanation:
Clean agents are gases that do not conduct electricity or leave a residue and are nonvolatile. These agents are used in fire extinguishers to suppress fires by removing heat or reducing oxygen levels. They are also commonly referred to as clean extinguishing agents. Examples of clean agents include carbon dioxide, halocarbon gases, and inert gases like nitrogen and argon.