Wikipedia has a decent article if you've never read it: https://en.wikipedia.org/wiki/Terraforming_of_Mars#Challenges_and_limitations https://en.wikipedia.org/w

Wikipedia has a decent article if you've never read it: https://en.wikipedia.org/wiki/Terraforming_of_Mars#Challenges_and_limitations https://en.wikipedia.org/wiki/Terraforming_of_Mars#Challenge...