This experiment tested the effect of exposure to varying carbon dioxide concentrations on cellulosic bioethanol levels from Liriope muscari, also known as lily turf. After the exposure period, the plants were processed and broken down by grinding and boiling, then the cellulose in the stems were converted to glucose using the enzyme cellulase, to then be processed by active yeast cells to create ethanol through alcoholic fermentation. The hypothesis was that the experimental group exposed to elevated carbon dioxide levels would yield lower ethanol concentrations per solution than the control group, and this hypothesis was supported by the results. Three of the four control group plants produced ethanol concentrations higher than the highest concentration of the experimental group. It was concluded that increased concentrations of air pollutants, like greenhouse gas carbon dioxide, could be harmful to the future of the biofuel industry and the cellulosic biofuel sector in particular.