Corba de Keeling
<a href="//commons.wikimedia.org/wiki/User:Delorme" class="mw-redirect" title="User:Delorme">Delorme</a>, translation by <a href="//commons.wikimedia.org/wiki/User:Jmarchn" title="User:Jmarchn">Jmarchn</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>.  Data from Dr. Pieter Tans, <a rel="nofollow" class="external text" href="http://www.esrl.noaa.gov/gmd/ccgg/trends/">NOAA/ESRL</a> and Dr. <a href="https://en.wikipedia.org/wiki/Ralph_Keeling" class="extiw" title="en:Ralph Keeling">Ralph Keeling</a>, <a rel="nofollow" class="external text" href="http://scrippsco2.ucsd.edu/">Scripps Institution of Oceanography</a>.