Habitability of an icy volcano planet

Suppose we have a rocky planet (somewhere between Earth- and Super-Earth- sized) orbiting a star far enough away that it would be around Pluto's temperature if sunlight was the only heat source. If we give it a thick molten core and large amounts of volcanic activity that bring its surface temperature up to around -20°F, would it possible for humans (from Earth, not native) to live there without special gear, or would such volcanic activity render the air unbreathable? Are there any other ways significant volcanic activity would render a planet uninhabitable?

posted almost 9 years ago

Joshua Snider‭

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