I think that grass has a future in space. A few years ago there was studies done about which plants improved the atmosphere the best. I think NASA even did a study. From what I seen I don't think that anyone even looked at grass. I use to grow wheatgrass and I was shocked and totally amazed at how much it improved the air in my apartment. I've owned a few different air filters over the years and none of them even came close to doing a good of a job as just growing one flat of wheatgrass. It didn't just add better gases it actually filtered the air and made it remarkably clearer.