The Keeling Curve - The measured concentration of CO2 in the atmosphere
Measurements made at Mauna Loa, Hawaii.
Source of data: CDIAC/SIO
Source of graph: Wikipedia - "Own work, from Image:Mauna Loa Carbon Dioxide.png, uploaded in Commons by Nils Simon under licence GFDL & CC-NC-SA ; itself created by Robert A. Rohde from NOAA published data and is incorporated into the Global Warming Art project".
Questions for discussion
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