Closing classroom windows does not cut air pollution, study finds

Tests conducted at 500 UK sites show particle pollution exceeded health guidelines on 6% of school days

Keeping the classroom window closed is not the answer to reduce the amount of pollution coming into schools, a recent study has found.

A project called SAMHE (Schools' Air quality Monitoring for Health and Education) operated air pollution monitors in nearly 500 classrooms for an academic year and found that days with high outdoor pollution led to higher pollution inside the classrooms.