Which type of extinguishing agent is typically non-toxic and environmentally friendly?

• A. Foam
• B. Dry Chemical
• C. Carbon Dioxide
• D. AFFF

Answer: (D)

Aqueous Film-Forming Foam (AFFF) is known for its effectiveness in extinguishing flammable liquid fires while being less toxic compared to some other extinguishing agents. It forms a film on the surface of the burning liquid, which smothers the fire and prevents re-ignition by cutting off the oxygen supply. AFFF is primarily used for fighting fires involving hydrocarbons, such as those found in fuel and oil spills, making it suitable for use at airports where such incidents are more likely to occur.

Moreover, many formulations of AFFF are designed to have minimal environmental impact, and advancements continue to reduce its toxicity, making it a safer choice for both personnel and the environment. In contrast, other agents such as dry chemical and carbon dioxide can sometimes have environmental concerns or may pose risks to those in the vicinity, particularly in confined spaces.