re: #333 Anymouse

I think a space capsule is bigger than a Smart. I am not sure there is enough room in a Smart for CO2 scrubbers, though there was an episode of Bones where Hodgkins rigged up one from the lithium batteries in the car they were buried in. That might work.

Your biggest problem would be keeping the air inside the car. And waste removal.

Definitely not suitable for space travel. Needs modifications.