File name: maunaloa_weekly-CO2-graph-with-photo-2014_610.jpg Original Resolution: 610 × 307 File Size: 58 KB (MIME Type: image/jpeg) Date Published: March 18, 2022 Download file View image caption Weekly average concentration of carbon dioxide at Mauna Loa between 2010 and early 2014. Graph by NOAA Climate.gov, based on data provided by NOAA ESRL. Mauna Loa photo by Mary Miller, Exploratorium.