Indoor environments, where people spend nearly 90% of their lives, significantly influence health and well-being through air quality, specifically carbon dioxide (CO2) concentrations. This study investigates the role of indoor plants in modulating CO2 levels under controlled light and temperature conditions. Three indoor plants—Bonsai, Dieffenbachia, and Yucca— were positioned inside a glass-walled compart-ment to prevent direct sunlight while providing sufficient illumination, simulating typical indoor light conditions. CO2 concentrations were monitored using CO2 Datalogger, which recorded data every 5 minutes. The results demonstrate that all tested plants effectively reduced CO2 concentrations, with Dief-fenbachia showing the most substantial decrease, followed by Yucca and Bonsai. This research highlights the potential of indoor plants not only to enhance indoor air quality but also contribute to health and productivity by mitigating CO2 accumulation, offering a sustainable strategy to improve environmental conditions in indoor spaces.