Current level of carbon dioxide in the atmosphere. Information has been taken from web page of CO2Now.org, Mauna Loa CO2 Board, Scripps Institution of Oceanography. More information at https://scripps.ucsd.edu/programs/keelingcurve/
June 1, 2015 — 403.12 parts per million
June 1, 2014 — 401.67 ppm
April 2015 monthly average — 403.34 ppm
April 2014 monthly average — 401.33 ppm
2014 annual average 398.60 pm
Global data
March 2015 — 400.83 ppm
March 2014 — 398.10 p[pm
2014 annual average 397.16 ppm
