lol Bro, yeast is a living organism, It uses oxygen and releases co2 as a waste product. The co2 it releases is used by the plant making it healthier, and the plant releases oxygen. Green plants use Co2 as part of the photosynthesis process. Therefore the yeast releasing co2 is a natural way to boost plant metabalism. In an indoor environement such as I have,(no outdoor air exchange) it may help the plants develop, or so I've been reading. I put 3 packages of yeast (disolved in warm water) with 1 cup of sugar into 3 quarts of warm (not hot) water. I put it in a gallon jar covered with cheeseclothe and held with a rubber band. Hope that helps, Sis