Biofuels good idea or something stupid/unnecessary?
When we develop medium-sized colonies would it be possible to produce biofuel? Of course I know needed water, fertilizer (in plants), sunlight, carbon dioxide and other things.
We could grow algae, microorganisms or plants for that.
We may be able to use the waste (if added) that kerbals would produce.
We can extract from alien ecosystems (if added)