Letter to the editor of environmental research concerning: Walach, H. et al. "Carbon dioxide rises beyond acceptable safety levels in children under nose and mouth covering: Results of an experimental measurement study in healthy children". Environ. Res. 212 (2022) 1135664
Environ Res. 2023 Jul 1:228:115101.
doi: 10.1016/j.envres.2022.115101.
Epub 2022 Dec 20.