Vitalik Buterin
@vitalik.eth
Airvalent CO2 monitors. https://airvalent.com/ Exciting to see how small these are getting, similar size to apple airpods case. Looking forward to seeing this tech ~1-3 versions from now, where air quality monitoring can just be part of a smartwatch.
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Alex
@sacrededio
This is nice thing. Also oxygen level monitoring would be nice to add too. There is lower oxygen level in big cities. Lower then 21%. Especially when heating.
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