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Message: <blockquote data-quote="Zappo" data-source="post: 471913" data-attributes="member: 633">He didn't say that the high CO2 is dangerous, but that it would help lychens. In my opinion, even if certain lychens could probably withstand the temperature and composition of the atmosphere, I think they'd die because of the low pressure. 1/60 of Earth's IIRC, I could be mistaken but that's the order of magnitude. There's just not enough of an atmosphere to worry about its composition. I'm for the use of genetically engineered bacteria. That's the biggest obstacle to life on Mars; we need a fairly precise pressure to survive and I have no idea of how we could change it so that it's exactly the right one. Once that is done, you could walk on Mars with just heavy clothes and an oxygen mask, which isn't bad overall.There is no way to make the Moon survivable; at least not in the close or medium future. I have a hard time even imagining the technology and resources involved. The only thing we can hope for is an underground base. On a theorical level, if the base is a mostly well closed system, you only need a good source of energy and enough tech to survive.After that, getting CO2, oxygen or water can be done; you just breathe to get CO2; you grow plants to get oxygen (IIRC, a large tree produces enough oxygen for a human - I bet we could come up with something more efficient though); you burn hydrogen to get water (and recover some energy in the process).It'd take energy for all of that, of course. Big solar panels, I guess, at least for now. Nuclear fusion when/if it works.</blockquote>

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