What type of alternative fuel presents a hazard during vehicle extrication?

Hydrogen presents a significant hazard during vehicle extrication due to its unique properties. It is a highly flammable gas that can ignite with even a small spark or flame. During an extrication scenario, if a vehicle powered by hydrogen has sustained damage, leaks may occur, creating an explosive atmosphere. The rapid dispersion of hydrogen gas makes it difficult to detect, posing an increased risk for responders and victims alike.

Moreover, hydrogen burns with an almost invisible flame, making it particularly dangerous in situations where firefighters and emergency personnel may not be able to see the hazard visually. The inhalation of hydrogen gas can also be particularly harmful due to potential asphyxiation risks in confined spaces.

In comparison, while gasoline indeed poses its own hazards, particularly when spilled or ignited, it has been a common fuel source for a long time, and responders generally have more experience and established procedures for managing gasoline-related incidents. Coal and wood pellets are less likely to be found in vehicles and do not present the same immediate flammability risks as hydrogen in extrication scenarios.