Almost everyone knows that plants and trees convert carbon dioxide into oxygen. We all need oxygen to breathe and survive. Every plant carries out this conversion. Some of them do this more effectively. NASA is always busy doing something.
One pot, two lives; a planter and a fishtank in one to promote a beautiful example of simbiotic living. While the fish's waste provides nutrients for the plant, the plant filters the water that it is fed to provide clean water for the fish.