Biocoils

I was very impressed with these biocoil thing-a-ma-jigs; they are basically coils of tubing filled with algae. Why are they so cool? Cause they can generate oxygen while absorbing carbon dioxide among other useful things. Not a big deal? It's enough to let a person live underwater with no other means of life support....try that with your rose bush and see how things work out.

Anyway, here are some links: To the original biocoil project (made by high school students).
To the guy who decided to live underwater with one!