Things that can destroy Earth with F

• Fire

  A planet-wide firestorm could scorch all life.

• Flood

  A global megaflood could wipe out humanity.

• Flames

  Planet-spanning flames could burn the biosphere.

• Fireball

  A huge asteroid fireball could cause extinction.

• 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.

• forest fires

  Global forest fires could suffocate and scorch life.

• Firestorm

  Global firestorm could burn biosphere, cook 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.

• Flu

  A hyper-lethal flu strain could become global extinction.

• Freezing

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

• Annonce
• 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

• Flare

  Massive solar flare could fry tech, risk collapse

• Falling stars

  Falling stars can mean meteors causing mass extinction ☄️

• Flares from the sun

  Solar flares/CMEs could fry tech, trigger collapse.

• Flying rocks

  Flying rocks can mean asteroids, a planetary-scale threat.

• flying asteroid

  A large asteroid impact could wipe out humanity.

• Fission

  Nuclear fission weapons could trigger global war.

• Flying meteors

  Meteors hitting in swarms could cause global extinction.

• Falling Asteroids

  Large asteroids falling could trigger mass extinction.

• Flying aliens

  Hostile aliens are scientifically plausible planet-destroyers.

• flaming meteor

  A huge flaming meteor impact could end civilization.

• 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.

• Freezing temperatures

  Global freezing temperatures could wipe out most life.

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