3 ms·

A nuclear conflict would do it. You don’t even need that many nukes to kick up enough dust to doom us all

• tsimionescu 6y ago
  If we were able to build self-sustaining colonies on Mars, surviving on a nuke-ravaged earth would be easy as pie. Sure, temperatures would go down (but nowhere near as cold as Mars) and it would be hard to harvest plants, but we would still have fossil fuels to generate electricity for grow rooms, and we would still have earth soils that are ultra-rich in nutrients. The surface would be nowhere near as radioactive, so people could still work outside, allowing mines and so on to keep operating as today. Overall, while it would be a huge tragedy, kill billions, and destroy our civilization as we know it, it would still leave the Earth as an absolute paradise compared to Mars.