Vitalik Buterin (@vitalik.eth): [Farcast] CO2 levels around 1300 on the subway, despite it being quite crowded.
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[Farcast] CO2 levels around 1300 on the subway, despite it being quite crowded. Not too bad! The medium-high CO2 and low PM2.5 in a crowded space suggest that both ventilation and filtration are being used.