Poor air quality in classrooms could be affecting children’s ability to learn.
A study by the Federal Health Office says the air in classrooms is ‘unacceptable’ with too high levels of carbon dioxide.
Teachers say the findings confirm their suspicions and say laws should be updated to protect staff and students in schools.
The health office has published guidelines on how to air out classrooms depending on the size of the room and the number of occupants.
Two schools in Basel have sent letters to parents warning them of a possible child molester on the streets.