Pearson school board releases latest CO2 readings
Gazette – Of Pearson’s 1,540 classrooms in 52 schools, 91 per cent had CO2 concentrations of less than 1000 parts per million…
Gazette – Of Pearson’s 1,540 classrooms in 52 schools, 91 per cent had CO2 concentrations of less than 1000 parts per million…