Pergium

• Radioactive element first discovered by Humans in the early 22nd century (ENT Novel: Beneath the Raptor's Wing)
• Fuel source for high-capacity energy reactors as late as mid-23rd century (TOS: "Devil in the Dark")
• Key component of life support technology in use by the Federation and its predecessors from 22nd through 24th centuries (ENT Novel: Beneath the Raptor's Wing; TOS: "Devil in the Dark"; VOY: "Fair Trade")
  • Used to regenerate air filters (VOY: "Fair Trade")
    • In-place reaction with pergium compounds breaks down and/or binds with contamination from filters, prolonging their lifespan