Build Your Own Ecosphere in a Jar
An ecosphere is a self-sustaining, closed ecological system that produces food and oxygen for its inhabitants while recycling waste and carbon dioxide. The interacting living organisms inside it can survive without external input over a long period of time. Getting the right balance in your ecosphere takes time, and it might take you a few tries to get it just right. If your ecosphere is a success, you will have a maintenance-free aquatic world that will last for months, even years!