Analysis of CO2 Absorption Capacity of Various Moss Species under Different Light Intensities and Humidity Conditions

As modern individuals spend most of their time indoors, maintaining optimal indoor air quality (IAQ) is essential for health and well-being.Moss has been recognized as a promising nature-based solution for IAQ improvement due to its CO 2 absorption and pollutant filtration capabilities.This study evaluated the CO 2 absorption capacity of six moss species under controlled conditions in a sealed acrylic chamber with two light intensities (50 and 200molm -2 s -1 ).Results showed that 'Hypnum plumaeforme' and 'Racomitrium yakushimense' exhibited the highest CO 2 absorption capacity (0.193, 0.494Lm -2 h -1 ) at 50 and 200molm -2 s -1 , respectively.Contrary to common belief, moss species demonstrated significantly higher CO 2 absorption efficiency under high light intensity, suggesting their adaptability to higher light environments.Additionally, higher relative humidity enhanced CO 2 absorption, with the capacity peaking at around 100% RH.Respiration experiments further confirmed that the rate CO 2 absorption through photosynthesis was approximately 2.9 times greater than the respiration rate.These findings highlight the potential of moss for IAQ improvement and carbon sequestration, offering insights into optimal species selection and environmental conditions for urban applications.