Smart homes, smart cities, and… smart facemasks?

Since the onset of the coronavirus pandemic, facemasks have become a major, though not uncontroversial, aspect of daily life.  Now, a study published in the scientific journal Nature by researchers from the University of Grenada has explored the creation of a smart facemask to help monitor the wearer’s inhalation of CO2.  When wearing a mask, not all the CO2 that we exhale can perfuse through the material before we inhale again, thus increasing the amount of CO2 b