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OftenBen · 3327 days ago · link · · parent · post: NASA Confirms Evidence That Liquid Water Flows on Today’s Mars
Well, they are until we figure out a better way of getting meaningful tonnage into orbit. Currently, the only way we can do that is with rockets. Which are pretty bad for the atmosphere, let alone the ecological damage necessary to produce them. And to supply the support staff to make missions successful.
briandmyers · 3327 days ago · link ·
It's always going to cost a lot of energy to pull mass out of our gravity-well. Trying to discourage space travel on environmental grounds seems wildly misguided to me - you get much bigger bang-for-buck tackling things like airline and automobile travel. It will be a LONG time before rocket-damage to the environment comes anywhere close to just those two.