Things that can destroy Earth with F

• Fire

  A planet-wide firestorm could scorch all life.

• Flames

  Planet-spanning flames could burn the biosphere.

• Famine

  Global famine could doom humanity and ecosystems.

• fossil fuels

  Burning them drives climate change, risking collapse.

• Fallout

  Nuclear fallout could poison the globe for ages.

• flying saucers

  Hypothetical alien craft; could destroy Earth.

• Fungus

  Fungal pandemics could devastate crops, forests, humans.

• fracking

  Uncontrolled fracking could trigger quakes, methane leaks.

• Farts from cows

  Methane from livestock adds to runaway warming risk.

• Freezing

  Global freezing (nuclear or volcanic winter) could end life.

• falling meteor

  A large falling meteor could cause mass extinction

• falling asteroid

  A big asteroid impact could wipe out most life

• Food shortage

  Global food shortage could collapse civilization

• Flares from the sun

  Solar flares/CMEs could fry tech, trigger collapse.

• Flying meteors
• Advertisement
• Fission

  Nuclear fission weapons could trigger global war.

• fat man

  Nuclear bomb codename; many could trigger nuclear winter.

• Factories

  Uncontrolled factories can drive runaway climate disaster.

• Fusion

  Runaway nuclear fusion reactions could unmake Earth.

The words in the list Things that can destroy Earth with F come from players of the word game Categories game.