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.

In Earth's atmosphere, carbon dioxide is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of three main greenhouse gases in the atmosphere of Earth.

Apr 9, 2024 · Based on the annual report from NOAA’s Global Monitoring Lab, global average atmospheric carbon dioxide was 419.3 parts per million (“ppm” for short) in 2023, setting a new record high.

Note the colors change as the amount of CO 2 rises from 365 parts per million (ppm) in 2002 to over 420 ppm currently. It's important to understand that “parts per million” refers to the number of carbon dioxide molecules per million molecules of dry air.

2,000-5,000 ppm : Headaches, sleepiness and stagnant, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present. 5,000 : Workplace exposure limit (as 8-hour TWA) in most jurisdictions. >40,000 ppm

3 days ago · Data are reported as a dry air mole fraction defined as the number of molecules of carbon dioxide divided by the number of all molecules in air, including CO 2 itself, after water vapor has been removed. The mole fraction is expressed as parts per million (ppm).

Mar 17, 2025 · Atmospheric carbon dioxide (CO₂) concentration is measured in parts per million (ppm). Long-term trends in CO₂ concentrations can be measured at high-resolution using preserved air samples from ice cores.

Average annual atmospheric levels of carbon dioxide (CO₂) reached a record high of 424.61 parts per million (ppm) in 2024. Monthly atmospheric CO₂ concentrations peaked that year in June, at...

Mar 16, 2023 · The fresh air we inhale will typically have about 400 ppm of background CO2 with the life sustaining oxygen of the atmosphere. By measuring your indoor air quality and CO2 ppm levels you can further mitigate air borne illnesses, lack of productivity, and create a …

Between 1979-2024, the concentration of carbon dioxide (CO2) in Earth's atmosphere has increased from an average of 336.56 PPM to 425.19 PPM (parts per million), a 26.33% increase during a 45 year time span.