Plasma fire
From Memory Alpha, the free Star Trek reference.
A plasma fire is a type of fire that is fueled by warp plasma or another type of super-energized gas. Plasma fires are sometimes caused by ruptures in a plasma conduit, the electro-plasma system, or some other high-energy power system. Plasma fires are known for their recognizably green color. (ENT: "The Forgotten")
In 2368, an EPS relay ruptured behind a wall in the cargo bay aboard the USS Enterprise-D when the ship ran into a quantum filament, and the conduit ignited into a plasma fire. Dr. Crusher and Commander La Forge were trapped in the cargo bay and put out the fire by opening the cargo bay doors to space. (TNG: "Disaster")
In 2372, a plasma fire broke out in the engine room of the USS Defiant. (DS9: "Rejoined")
Also in 2372, a huge plasma fire broke out in main engineering on USS Voyager while crew member Michael Jonas attempted to seize the ship for the Kazon while the Kazon were attacking. After fighting with Neelix, he fell into the plasma fire and was vaporized. (VOY: "Investigations")
