Banner Daily CO2 Numbers cc0 arindam saha 900


This page is being developed a web app prototype to deliver CO2 updates you can count on for accuracy and timeliness.



CO2 Numbers


A Bellweather Indicator for Planetary Environmental Stability, Global Economic Security & Inter-Generational Fairness


Nov. 15, 2019 : 410.68 ppm
Nov. 15, 2018 : 409.14 ppm
Change : 0.38%


Last Update: 3:35 a.m. on Nov. 16, 2019, Hawaii local time (UTC -10)


This table presents, as of the dates noted, the latest-available, high-precision measurements of carbon dioxide by NOAA-ESRL at the Mauna Loa Observatory (MLO) in Hawaii.  Units = parts per million (ppm).  More details are provided in the tabs below.



give 10 seconds a day to keep an eye on the atmospheric changes of greatest consequence to people's lives worldwide



Learn More About CO2 & The Daily CO2 Numbers


  • CO2 Q&A  Questions and answers on all thing CO2:  From the measurements and tracking to targets and solutions.
  • Radical Records for CO2  Track the all-time highs reached by atmospheric CO2 and compare them against the latest numbers.
  • Broadcasting CO2  Resource hub for broadcasters, publishers, bloggers and others who are bringing the CO2 signal to people in their worlds.