The Environmental Cost of Learning: CO2 Emission Comparisons of Virtual Reality, Online, and Alternative Distance Education

Purpose: Environmental sustainability has become a critical concern across various sectors, including education and healthcare. Professional training programmes, particularly in intensive care medicine, are essential for maintaining competency but often lack consideration of their ecological impact. This study was conducted by European Society of Intensive Care Medicine (ESICM) and investigated the carbon footprints of three distinct training modalities: in-person alternative distance training, online training, and virtual reality (VR) training. Methods: Data from 116 participants in ESICM training programs were used to estimate CO₂ emissions for each training modality, considering travel distances, transportation modes, and standardized emission factors. Results: CO₂ emissions were significantly lower for both online (median: 43 kg per participant, interquartile range: 32–64 kg) and VR training (median: 43 kg, interquartile range: 28–56 kg) compared to in-person training (median: 429 kg, interquartile range: 345–490 kg; p<0.001 for both comparisons). No significant difference was found between online and VR training (p=0.893) in terms of CO₂ emission. Conclusion: The findings highlight the environmental benefits of digital education modalities, contributing to a significant reduction in CO₂ regarding online and VR training compared to in-person alternatives.