Methane Menace

A creature of methane gas, though with effort she can take solid form. She moves silently, often invisible, and is able to release violent explosions. Embittered, half mad, she lurks in landfills, feeding off the methane gas, waiting for revenge.

In the early 2000s, in the name of the War on Terror, projects formerly deemed too dangerous are dusted off, and given another chance. Project Green is one of these, but its first modern victims are not terrorists, but those on duty when the remote research facility is sabotaged. The only survivor is Lieutenant Carla Green, the daughter of the original Major Green, though she often wishes that she'd also died.