> The soil can't grow anything Didn't we think Chernobyl would be a dead zone yet things are growing there? Not that I expected to be able to grow stuff on Mar

> The soil can't grow anything Didn't we think Chernobyl would be a dead zone yet things are growing there? Not that I expected to be able to grow stuff on Mars' soil without processing the ground. > You would need to live in a clean room on Mars because they build up in your system and slowly kill you Aren't we getting slowly killed by _everything_ here on earth? Why wouldn't we be able to build planet wide sealed structures, starting with a small region, and growing to surround the entire "liveable" surface? Of cource it's not a trivial task, but the planet already provides relative shelter from space, has at least _some_ gravity and provides some of the resources needed for survival (water it seems, metals that we can easily access, metals, some minerals, and so on).