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Daily CO2 


A reminder that our world is pushing the planet's thermostat beyond safe levels of 350 ppm CO2, and that more people are needed to combine our ingenuity and resources to keep the present overshoot brief.

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1 Year Change loading... ppm (loading...)


Last CO2 Earth update: loading... on loading..., Hawaii local time (UTC -10)

Data source: NOAA GML (Mauna Loa Observatory)
Units: parts per million (ppm)


This table presents the latest, daily average reading for atmospheric CO2 on the planet.  Updates happen once a day with few exceptions.


CO2 Is The Number to Watch

When the trend for atmospheric CO2 trend begins to falter and fall, we can expect global average temperature to follow.  For those who care about the sustainability of the planet, and who want it to remain a place where people can flourish, the measured CO2 levels in the atmosphere serve as the single best, real-time signal of whether the world as a whole is on track to a safe future, or needing to do more to get on track. 


Learn More About Atmospheric CO2 Readings & Stabilization

  • CO2 Records  Track the record highs for atmospheric CO2 levels, and compare them with the latest CO2 reported readings.
  • CO2 Q&As  Questions and answers on all thing CO2:  From measurements and tracking to targets and solutions.
  • CO2 Broadcasts  Resource hub for broadcasters, publishers, bloggers and others who are share the CO2 signal with people in their worlds. 




Explore the info under the tabs below for more info and daily CO2 readings.