The purpose of this study is to investigate the effects of indoor planting on CO_2 concentration. As a first step of the study, CO_2 mass balance was calculated by the model including photosynthesis and respiration of indoor plants. Through the analysis of variance, leaf index was found out to be the most important factor affecting on the CO_2 concentration. Then CO_2 concentrations were measured in 2 types of ariums, and the effects of indoor plantings were comfirmed.
