Jenny - RT @katewand: 1/ “Air is exchanged 4 times/hr in an office building. Air is exchanged 20/30 times an hour on a jetliner. Half that air is…

11:00pm PDT - June 23rd, 2021

RT @katewand: 1/ “Air is exchanged 4 times/hr in an office building. Air is exchanged 20/30 times an hour on a jetliner. Half that air is…

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