2022 Yes https://onlinelibrary.wiley.com/doi/full/10.1002/ijop.12827 Yuanguang, Ma Asia Review Students Middle/Jr High (6-8) Odor Stress/Anxiety Ambient aroma Middle school student Academic emotion The findings revealed that the middle school students preferred the aroma of sweet orange essential oil. Also, the ambient aroma of this substance could mitigate the reduction of positive academic emotions and improve negative academic emotions in the studied school students over time. The study provides new ideas for schools to create a positive educational environment.