They kind of already did that experiment in southern California for schools, they just need to run the numbers before and after filters installed adjusted for r

They kind of already did that experiment in southern California for schools, they just need to run the numbers before and after filters installed adjusted for regular pollution/suicide rates https://www.scpr.org/news/2018/02/05/80413/at-schools-near-freeways-air-filters-help-students/ https://www.scpr.org/news/2018/02/05/80413/at-schools-near-f...