#Covidco2

Pictured throughout thread are CO2 readings from my classroom Aranet4 CO2 meter. I have two 90-min classes (8:00-9:30, 9:40-11:10) & one 25-min homework/reading period (11:20-11:45) before lunch/prep from 11:50-1:15 &
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1/ The @nytimes has a good interactive story on the safety of flying during the pandemic, but they didn’t discuss boarding & deboarding. Judging by CO2 readings I saw on
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