Sew Face Masks Philadelphia -#masks4all #MutualAid Profile picture
PHL area all-volunteer grassroots community org sewing, collecting distributing free reusable cloth face masks; education safety advocacy. #ZeroWaste #MaskUpPHL
Jul 20, 2021 10 tweets 4 min read
inquirer.com/education/phil…

Via @oonagoodinsmith @frankkummer @newskag

#HEPA is best; #keepitsimple #phlED “Ozone, a lung irritant, is produced indirectly by ion generators & directly by ozone generators. While indirect ozone production is of concern, there is even greater concern with the direct, and purposeful introduction of a lung irritant into indoor air.”
epa.gov/indoor-air-qua…