Data
Below is carbondioxide (CO2) data measured at the Zeppelin Reseach Station. The blue dots show the montly averages, and the red dots the yearly averages. The green dots show a fitted curve. Currently the CO2 increases by ca 2 ppm every year.
CO2 data is reported to the GAW database.
![Carbon dioxide trend](images/CO2data_Zeppelin-2014.png)
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