![Richard Barrow on Twitter: "Measuring the virus in the air is not easy. But CO2 meters recognize exhaled air inside rooms and so is a good proxy for the aerosols that carry Richard Barrow on Twitter: "Measuring the virus in the air is not easy. But CO2 meters recognize exhaled air inside rooms and so is a good proxy for the aerosols that carry](https://pbs.twimg.com/media/E9259MnUUAMa0z-.jpg)
Richard Barrow on Twitter: "Measuring the virus in the air is not easy. But CO2 meters recognize exhaled air inside rooms and so is a good proxy for the aerosols that carry
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Carbon dioxide now more than 50% higher than pre-industrial levels | National Oceanic and Atmospheric Administration
Trends in atmospheric concentrations of CO2 (ppm), CH4 (ppb) and N2O (ppb), between 1800 and 2017 — European Environment Agency
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Desktop Co2/rh/temp. 3-in-1 Multifunctional Air Quality Detector Temperature Humidity Monitor Indoor/outdoor Co2 Meter Tester 3.5-inch Digital Hygroth | Fruugo ES
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