Anonymous ID: c6438b Aug. 17, 2020, 7:33 a.m. No.10317594   🗄️.is 🔗kun   >>7711

>>10317533

>where are the studies?

where are the studies for outdoor in environments of blowing dust, pollen and car exhaust? Where are the studies for inside large warehouse sized buildings like Home Depot and Walmart which rain down dirt from the rafters all the time?