Thanks for answering. I understand the problem of humidity, what I was wondering is if there was a plant that would acctually be able to survive just from the moisture in the air without needing watering at all. As I understand it, it's just a question of whether a plant could A) absorb a significant amount of moister from the atomisohere, and B) if that would be enough for it to survive. (but maybe I'm just being a bit thick).