This file was derived from data provided by the National Oceanic & Atmospheric Administration’s Earth System Research Laboratory, Dr. Pieter Tans, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends/) and Dr. Ralph Keeling, Scripps Institution of Oceanography (scrippsco2.ucsd.edu/).
“Mauna Loa CO2 monthly mean data”
As accessed on February 27, 2017 from: ftp:https://aftp.cmdl.noaa.gov/products/trends/co2/co2_mm_mlo.txt
Source page and more info: https://www.esrl.noaa.gov/gmd/ccgg/trends/data.html
Data was cleaned and converted to CSV using OpenRefine.