Answer:
If a spacecraft is in space for a long time, radiation is a problem. Designers must figure out a way to protect astronauts from the radiation.
I'm assuming you meant subsistence farming? If so then yes, it would be a large problem because they would then not have enough food to feed themselves.
Well, the hydrosphere is moving water to provide life for the biosphere. the geosphere is blocking the rain from the hydro and atmosphere from producing life past where it is blocking, so, in essence, the hydrosphere is "moved" into the atmosphere, where it drops onto the geosphere, creating the possibility for life in the biosphere everywhere that is not being "bullied" for lack of better term by the mountains blocking rain.
