School officials order windows screwed shut after teachers open them to increase ventilation

Teachers at a school in Abbotsford, B.C., started opening classroom windows after learning in December that there was no ventilation system in an older wing of the school. But many of the windows were later screwed shut, with school officials citing safety issues.
Read more: https://www.cbc.ca/news/canada/british-columbia/school-windows-screwed-shut-covid-air-exchange-1.5920084?source=Snapzu