Carbon Dioxide Concentration By Decade
concentration in parts per million* (ppm)
Each line represents one decade, from 1958 to 2017.
*The mole fraction of CO2, expressed as parts per million (ppm) is the number of molecules of CO2 in every million molecules of dried air (water vapor removed).
Gregor Aisch, Datawrapper
National Oceanic & Atmospheric Adm. (NOAA)
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