Finding F-0159

“The indoor PM2.5 24-h levels exceeded the WHO AQG limit on several sampling days (67.9% of the total 24-h indoor concentrations considered).”

Rovelli et al. Airborne particulate matter in school classrooms of northern Italy (2014). International journal of environmental research and public health. Page 16. CKB 6882

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Population: schoolchildren
Setting: classroom, IT
Study design: measurement study of indoor size-fractioned particulate matter in classrooms of seven schools in Milan over two sampling campaigns (5-day and 24-h means), compared with outdoor levels and WHO guideline values (class 4)
Effect: share-above 67.9
Averaging time: 24-h means

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.