All of our ships meant for more than one or two people have space and plantlife. It's the defining feature of our capital ships - one end has the bridge, the engines, the weapons, and so on, and on the other end is a module containing a field with trees and water, about a third of a mile across. We need to run through living plants to feel healthy and at peace. Besides that, literally everyone hates portable rations.
It's not all green though. Most Earth plants are somewhat monochromatic.
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It's not all green though. Most Earth plants are somewhat monochromatic.