Trends in atmospheric concentrations of CO2 (ppm), CH4 (ppb) and N2O (ppb), between 1800 and 2017 | Maps and charts | European Environment Agency (EEA)
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Note:
CO₂ (Carbon dioxide) in parts per million (ppm)
CH₄ (Methane) in parts per billion (ppb)
N₂O (Nitrous oxide) in parts per billion (ppb)

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References and footnotes