What children breathe in classrooms

International action of doctors, in which 7 Sofia schools participated. NO2, PM2.5 and CO2 levels were measured in the classrooms of these 7 schools for 4 weeks. A representative of Air for Health visited the classroom for 20 minutes, in which he introduced the students to the study and the main problems that pollutants cause. PM2.5 are small pollutants that cause various health problems as they penetrate the lungs into the bloodstream. High levels of CO2 can lead to headaches, drowsiness, poor concentration, loss of attention, etc.